Home

Are horse chestnuts poisonous to dogs

Horse Chestnut ASPC

Horse Chestnut. Additional Common Names: Buckeye. Scientific Name: Aesculus glabra. Family: Hippocastanaceae. Toxicity: Toxic to Dogs, Toxic to Cats, Toxic to Horses. Toxic Principles: Aesculin (a glycosidic saponin), other saponins. Clinical Signs: Severe vomiting and diarrhea, depression or excitement, dilated pupils, coma, convulsions. Horse Chestnut plants are toxic to cats. Signs include, oral irritation, burning of mouth & throat, increase in thirst, vomiting, diarrhea, & kidney failure. 24/7 ANIMAL POISON CONTROL CENTER: (855) 764-7661 Call No Conkers and dogs don't mix as they contain a poison called aesculin, which is found in all parts of the horse chestnut tree, including the leaves. Dogs normally need to ingest several to suffer severe poisoning. In autumn, our emergency vets regularly see cases of conker poisoning in dogs. While serious cases are rare, they do occur

The Horse Chestnut is poisonous for both cats and dogs. Typical symptoms include coma, convulsions, depression, diarrhea, dilated pupils, excitement, loss of coordination, twitching, vomiting and wobbly. Horse Chestnut is one of 13-19 species of Aesculu native primarily to the regions of the United States Yes, dogs can eat sweet chestnuts. Horse chestnuts are toxic to both humans and dogs, but sweet chestnuts are safe for both. Make sure to cook them properly before serving. Warning: Some human foods can be dangerous, or even fatal, for your dog to consume Horse chestnuts often called conkers, contain aesculin, which is known to be toxic to dogs. Aesculin and horse chestnuts aren't just toxic to dogs but can also make humans and other animals, including cats, extremely sick. Play it safe and learn the difference between horse chestnuts and sweet chestnuts. Can Dogs Eat Chestnut Shells There are two reasons for this. Firstly, the large nuts could cause a blockage in your pet's stomach. Secondly, they contain a chemical called aesculin - found in all parts of the horse chestnut tree, including the leaves - which is toxic to dogs. What are the symptoms of dog conker poisoning There are some animals that can safely eat conkers. These include wild boars and deer. However, they are too toxic for humans to eat and will make people unwell. Strangely, despite the name horse..

The following Aesculus species are reportedly toxic to animals; A. glabra ( Ohio buckeye), A. californica ( California buckeye), A. pavia (Red buckeye), A. octandra (Yellow buckeye), and the introduced species A. hippocastanum (Horse Chestnut). The buckeyes and horse chestnut are not related to the edible chestnut (Castanea spp Whole chestnuts pose a choking or obstruction risk. Horse chestnuts are toxic to dogs. Horse chestnuts can cause vomiting, seizures, paralysis and can be life-threatening. Chestnuts are high in fiber and lower in fat than most nuts. Can Dogs Eat Hazelnuts? Hazelnuts are not toxic to dogs however they are not easily digested

Horse Chestnut Is Toxic To Dogs Pet Poison Helplin

Can dogs eat horse chestnuts? No, you shouldn't be feeding your pet horse chestnuts. It is because the seeds of horse chestnuts contain aesculin, a coumarin glucoside that is toxic to dogs and can lead to aesculin toxicity in them. The common symptoms of aesculin toxicity are tenderness, drooling, vomiting, diarrhea, and appetite loss Are horse chestnuts poisonous to dogs Should you pick a horses chestnuts? Normally a horse's chestnuts will slough off or peel off as needed; however there are those (namely older horses) who will grow really long ones, and they may need 'trimming'you can either peel them off, or snip them off using a hoof nipper Conkers are horse chestnuts, which are different to edible chestnuts, and they're toxic. The bottom line on chestnuts is that while it's fine to feed your dog occasional treats of edible chestnuts, if your dog has a propensity to devour conkers, you should prevent them from doing so. Click to see full answer Pet health experts say conkers contain a chemical called aesculin, found in all parts of the horse chestnut tree, including the leaves, and which is toxic to dogs. Although fatalities in cases.. The toxic horse chestnut is rounded and smooth with no point or tassel. Quality, curing and season. The value of a chestnut is based primarily on its size and most nuts are sold fresh in the shell. Smaller quantities are available peeled and frozen or in value-added forms like chips, flour and slices. Chestnuts require a two- to three-week.

Harmful content: Due to its horrible taste, it's unlikely that you or your dog would eat enough horse chestnuts to result in death. The main toxin that affects dogs is aesculin (a glycosidic saponin), although other saponins in the nuts are also harmful to canines Yes, Horse Chestnut is toxic to dogs! Dogs accidentally consuming the Horse Chestnut plants can show the following clinical symptoms: Vomiting, Prolonged Depression, Incoordination, Hypersalivaton, Sleepiness Or Excitation, Dilated Pupils, Low Body Temperature, Low Blood Pressure, Coma, Seizure And Death (In Rare Cases). Horse Chestnut consumption is also toxic to Cats and Horses Toxic horse chestnuts cause serious gastrointestinal problems if consumed by humans. Are horse chestnuts poisonous to animals as well? They are. Cattle, horses, sheep and chickens have been poisoned by eating poisonous conkers or even the young shoots and foliage of the trees. Even honeybees can be killed by feeding on horse chestnut nectar and. Yes chestnuts are safe for dogs to eat! The ASPCA claims that the American Chestnut is fine for dogs to eat. In fact, this nut doesn't cause toxicity in horses, cats or dogs. So, if you have other animals, you might be able to feed them chestnuts safely. You want to make sure that the chestnut is a pure chestnut - not mixes or some other.

Are Conkers Poisonous to Dogs? Can Dogs Eat Chestnuts

  1. Horse chestnut trees drop hard, dark brown nuts, or conkers, from September onwards. Just like the tree's bark, leaves and flowers, they can be fatal to dogs if ingested. Not only do they pose a choking risk due to their size and shape, they also contain a deadly toxin called Aesculin which is poisonous to pups
  2. 3. Horse Chestnut. All parts of the horse chestnut and its seeds, known as conkers, are toxic due to the presence of aesculin, a neurotoxin. A dog that chews on or consumes any part of the horse chestnut tree and its conkers needs to be brought to the vet clinic in Bend for immediate attention
  3. Toxic to eat for dogs The game of conkers may not be dangerous for children, but eating conkers can be hazardous for dogs. This is due to a chemical component in the seed called aesculin, which is also present in the leaves and bark of horse chestnut trees
  4. istration considers the whole horse chestnut to be an unsafe herb. Consu
  5. Horse chestnuts belong to the Ausculus family, and their nuts (conkers) contain sterols, alcohols and alkaloids. These are toxic compounds, and while the ingestion of one or two conkers is unlikely..
  6. The Horse Chestnut is native to the mountainous-slopes of the eastern Balkan forests but has been introduced to North America. Horse Chestnuts are pretty common in urban areas, so if you prefer taking your dog on hikes throughout town or in the city, it would be helpful to be able to differentiate this nut from the American Chestnut

Pine cones and chestnuts are not toxic, which means they don't contain a poisonous substance. However, these are often swallowed by dogs while playing in the park or forest. Pine cones and chestnuts can also lead to constipation and gastrointestinal issues Horse chestnut is a tree. Its seed, bark, flower, and leaves are used to make medicine. Horse chestnut contains significant amounts of a poison called esculin and can cause death if eaten raw Horse chestnuts are poisonous to dogs. It causes a reduction in red blood cells. Watch for vomiting and diarrhea, jaundice, seizures. If there are any signs of this within 12 hours, go to the Vet. Horse chestnut trees drop hard, dark brown nuts, or conkers, from September onwards.Just like the tree's bark, leaves and flowers, they can be fatal to dogs if ingested. Not only do they pose a choking risk due to their size and shape, they also contain a deadly toxin called Aesculin which is poisonous to pups Buckeyes -- also known as horse chestnuts -- are highly toxic to dogs. All parts of Aesculus glabra, called the American buckeye tree, the Ohio buckeye, horse chesnut tree, fetid and stinking buckeye, are toxic due to chemicals in the tree's nuts, leaves and bark. The nuts can also pose a choking hazard to dogs

Is Horse Chestnut Poisonous to Cats and Dogs

What eats horse chestnuts? They are poisonous to most animals too, including dogs, but some species such as deer and wild boar can eat them. Curiously, conkers are also poisonous to horses despite the tree being named after them. Conkers aren't much use for eating, but they're still one of the best parts of autumn These hard, brown chestnuts come from horse chestnut trees and can be found on the ground, inside or outside their green prickly casings. As conkers contain aesculin, a substance that is toxic for dogs if ingested in sufficient amounts, they can be dangerous to our pets 43. Horse Chestnut. Horse Chestnuts are really attractive because of their shiny appearance. However, consuming these nuts could cause dogs to throw up, collapse, and even suffer paralysis of the respiratory system even. These nuts could also cause serious blockage of the gut in animals as well

Can Dogs Eat Chestnuts? Are Chestnuts Bad for Dogs

  1. Chestnuts are best to avoid as they can be a potential choking hazard for your dog. Although nontoxic to dogs, these starchy nuts are pretty big and could cause an intestinal blockage. Also, definitely avoid horse chestnuts, which are toxic to humans and pups. Horse chestnuts can cause vomiting, seizures, paralysis and can sometimes be lethal
  2. The horse chestnut is a beautiful ornamental tree with attractive leaves and flowers. It produces prickly fruit capsules that contain a glossy brown and nut-like seed. The seed is known as a conker and has been used in a popular children's game since at least the mid-nineteenth century. The game gets its name from the seed and is known as conkers
  3. Are horse chestnuts poisonous to dogs? Firstly, the large nuts could cause a blockage in your pet's stomach. Secondly, they contain a chemical called aesculin - found in all parts of the horse chestnut tree, including the leaves - which is toxic to dogs
  4. al pain in dogs

No. Conkers contain a poisonous chemical called aesculin. Eating a conker is unlikely to be fatal, but it may make you ill. They are poisonous to most animals too, including dogs, but some species such as deer and wild boar can eat them. Curiously, conkers are also poisonous to horses despite the tree being named after them Poisonous Plants for Dogs Many common household indoor and outdoor plants are poisonous to dogs. Most cause non-fatal symptoms such as diarrhea, vomiting and drooling. Others can * Horse chestnut (vomiting, painful abdomen, diarrhea - toxic in larger quantities) * Horsehead Philodendron * Horseweed * Horse nettl Below is a list of plants that are common to the Pacific Northwest and also happen to be toxic for dogs. TOXIC PLANTS. Urban Plants. English Ivy; Horse Chestnuts; English Laurel; Rhododendron; Rural Plants. Common Tansy; Death Camas; Death Cap Mushroom; Foxglove; Lily of the Valley; Poison Hemlock/Water Hemlock; Bleeding Heart; Larkspur. Outdoor Plants That Are Toxic to Dogs. Many flowers, trees, and shrubs can pose a danger to dogs. Let's start with outdoor plants, shrubs and flowers that are toxic to dogs, and then we'll list indoor plants. The final section contains a list of plants that are safe, or non-toxic, to dogs (Source: ASPCA). Trees toxic to dogs

Can Dogs Eat Chestnuts - Tindo

Horse Chestnut Don't confuse this shrubby tree with the chestnuts for eating. Horse chestnut is loaded with toxins. And while every good dog owner knows that onions are toxic to dogs, these. The small buckeye tree is in the horse chestnut family. It can grow to be about 15 feet and as tall as 50 feet under the right conditions in the wild. Are Weeping Cherry Trees Toxic to Dogs.

Are conkers poisonous to dogs? Blue Cros

List of Dog Toxic Plants. This is a list of the most common types of dog poisonous plants. It does NOT contain every possible variety. Click on the link on the top of each column to see more details on the toxic parts of the plant, why it is poisonous to dogs and related symptoms Common Poisonous Plants Dangerous for Dogs Aloe Vera (Toxic) Aloe vera contains both saponins and anthraquinones. Both of these chemical compounds are toxic to dogs in large amounts. After being consumed, aloe usually causes gastrointestinal symptoms like vomiting and diarrhea. Lethargy is also common Are chinese chestnut poisonous to dogs - Answered by a verified Veterinarian Experience: Have worked with large and small animals, including cows, horses, goats, dogs, cats, birds, ferret. Verified. The nut is not poisonous, but if your dog swallows an entire nut with the shell on, there is the potential for it to cause a blockage SOUTHEAST GEORGIA VETERINARY CLINIC. 104 CANDLER DR. BRUNSWICK, GA 31523. (912)554-8388. www.southeastgeorgiavetclinic.com. POISONOUS PLANTS TO AVOID. There are a number of common plants which may be toxic to dogs and cats and should be avoided. These include: Arum Lily How poisonous are horse chestnuts? Horse chestnut contains significant amounts of a poison called esculin and can cause death if eaten raw. Be careful not to confuse Aesculus hippocastanum (Horse chestnut) with Aesculus californica (California buckeye) or Aesculus glabra (Ohio buckeye). Some people call any of these plants horse chestnut

The toxic, inedible horse chestnuts have a fleshy, bumpy husk with a wart-covered appearance. Both horse chestnut and edible chestnuts produce a brown nut, but edible chestnuts always have a tassel or point on the nut. Are chestnuts poisonous to dogs? Yes, dogs can eat sweet chestnuts. Horse chestnuts are toxic to both humans and dogs, but. The needles and seeds of yew trees are extremely poisonous to many animals, including dogs, horses and sheep. Eating just the leaves can result in dangerous consequences, even leading to death in severe cases. Their leaves are distinctive, meaning they are easily identifiable. 3. Horse chestnut tree Poisonous plants. Some common garden species including Ivy, Rhododendron and Bluebells can be extremely toxic to dogs. Acorns and Horse Chestnuts should also be avoided. Acorns are considered to be the more toxic of the two

No, you cannot consume these nuts safely. Toxic horse chestnuts cause serious gastrointestinal problems if consumed by humans. Are horse chestnuts poisonous to animals as well? They are. Cattle, horses, sheep and chickens have been poisoned by eating poisonous conkers or even the young shoots and foliage of the trees PLEASE NOTE: Poisonous does not mean deadly. Some manifestations of toxicity are subtle. The dose, as always, determines if a plant is safe source of nutrients or a toxic hazard

The toxic horse chestnut is rounded and smooth with no point or tassel. Also, can you eat horse chestnut tree? One thing we need to understand is that chestnuts are sweet and they are edible but conkers or horse chestnuts are poisonous, and they are not for eating purposes Conkers are poisonous to most animals too, including dogs, but some species such as deer and wild boar can eat them. Sweet chestnut trees and horse chestnut trees are not actually related, but. The seeds are also dangerous to animals, so if you are walking a dog or riding a horse near a Horse Chestnut plant take care to avoid it. You will recognize a Horse Chestnut tree by the distinctive white flowers with pink blotches at the base. The fruit is an unmistakable green, spiky shell surrounding the large nut-like seeds Are chestnuts poisonous? Edible chestnuts belong to the genus Castanea and are enclosed in sharp, spine-covered burs. The toxic, inedible horse chestnuts have a fleshy, bumpy husk with a wart-covered appearance. Both horse chestnut and edible chestnuts produce a brown nut, but edible chestnuts always have a tassel or point on the nut Other plants that are poisonous to dogs. Other plants that also contain saponins and are similarly poisonous to dogs include the following: Daisies; Soapwort; Broomweed; Christmas rose; Corn cockle; Asparagus fern; Cow cockle; Horse chestnut trees; Please note that this list is not exhaustive and is intended as guidance only. Plants that aren.

Michigan Fresh: Edible Sweet Chestnuts (E3213) | MSU Extension

All you need to know about horse chestnut trees and conker

Guide to Poisonous Plants - College of Veterinary Medicine

Nine poisonous plants horses should avoid Ragwort. While ragwort has a bitter taste and is rarely eaten by horses when it is growing, when it is wilted or dried it becomes more palatable. Foxglove. Deadly nightshade. Buttercups. Acorns. Yew. Privet. Rhododendron. These are the most dangerous plants for horses and other livestock. Water hemlock (Cicuta [ The horse chestnut contains alkaloids and a class of toxic chemical called saponins, but the most dangerous is a compound called aesculin, which is extremely toxic to dogs. Symptoms Dogs that ingest horse chestnuts exhibit symptoms that may include vomiting, diarrhea, depression or excitability, and in extreme cases convulsions or coma toxic plants of dogs, plants that will hurt a dog Horse ChestNut (Nuts and Twigs) fatal gastroenteritis, death Hydrangea (Flower Bud) fatal Abdominal pain, convulsions, vomiting, bowel incontinence, lethargy, coma, death Hyacinth (Bulb) fatal diarrhea, vomiting, nausea, death Heart Leaf (Leaves) mild pain and burning of th

Horse Chestnut (Buckeye): This tree contains saponin, Geranium: All varieties of this common container plant are poisonous to dogs. The symptoms include lethargy, low blood pressure, skin. Conkers (horse chestnuts) These beautiful shiny seeds may appear very attractive to your dogs, but are usually only found in autumnal months. All parts of the horse chestnut could make your dog ill, with effects including being sick, having an upset stomach, dribbling and being off their food What Plants Are Poisonous Or Toxic To Dogs. Posted by on 9/26/2016 to Birds & Wildlife. THE FOLLOWING PLANTS CAN BE DANGEROUS TO DOGS: This is only a partial list. Acocanthera (fruit and flowers) Buckeye Horse Chestnut (sprouts, nuts) Buckthorn (fruit, bark) Buttercup (sap, bulbs) Calla lily (all parts) Caladium (all parts

POISONOUS PLANTS TO AVOID. There are a number of common plants which may be toxic to dogs and cats and should be avoided. These include: Arum Lily . Autumn Crocus . Australian Flame Tree . Horse Chestnut . Horsetail. Hydrangea . English Ivy . Jasmine . Jimsonweed. Lantana. Larkspur. Lily Of The Valley Chestnuts in dog's diet. Chestnuts are not poisonous for dogs. However, if you choose to give him chestnuts you should do that in smaller amounts. This is because their digestive tract can't process nuts and seeds, so in larger amounts they can cause diarrhea or vomiting. It is the same rule that can be applied to lobsters The nut of the poisonous horse-chestnut or buckeye is smooth brown with a circular, light-colored eye on one end. (Hence the name: buckeye because of the resemblance to a buck deer's eye.) Located on the inside of each leg of a horse is another chestnut. These chestnuts are thought to be the remnants of a toe The Horse Chestnut is poisonous for both cats and dogs. Typical symptoms include coma, convulsions, depression, diarrhea, dilated pupils, excitement, loss of coordination, twitching, vomiting and wobbly. The young foliage of the tree is also poisonous. The scientific name for this plant is Aesculus glabra Buckeyes - Also known as horse chestnuts, the nuts and twigs of this plant are toxic to dogs. If they pup eats them, it will suffer severe gastrointestinal pain and a vet should be sought out immediately. The plant will not kill the average dog unless they eat a lot of it in comparison to their body mass. 9

8 Common Wild Plants That Are Poisonous to Your Dog

Nuts Dogs Can Eat and Nuts Harmful to Dogs - Spoiled Hound

Ingestion of Buckeyes or Horse Chestnuts can result in severe vomiting and diarrhea, either depression or excitement, dilated pupils and, in severe cases, wobbly gait, convulsions and even coma. Cyclamen (Sowbread) contains terpenoid saponins and eating this plant will result in gastric upset Horse chestnut is a tree native to parts of southeastern Europe. Its fruits contain seeds that resemble sweet chestnuts but have a bitter taste. Historically, horse chestnut seed extract was used for joint pain, bladder and gastrointestinal problems, fever, leg cramps, and other conditions All parts toxic, especially to dogs, horses, humans. Horse Chestnut; Jasmine. Berries are extremely toxic. Lantana. Berries are poisonous. Larkspur. Moderately to highly toxic, especially the young plants and seeds. Lily of the valley. Both leaves and flowers are moderate to highly toxic. (sorry Animal Crossing fans Verdict: Do not feed raw cashews, but cooked or roasted cashews are generally safe in moderation. Chestnuts. American Chestnuts are not toxic to dogs, however, they can pose a choking or obstruction risk and can lead to gastrointestinal distress when eaten. Verdict: Ok if ingested, but avoid in favor of better options Similarly to peaches and apples, cherries contain cyanide-releasing amygdalin in their pits, which is toxic to dogs. Cherries can be even more dangerous than peaches because the pits are much smaller, making dogs more likely to eat them. In addition to the toxic pits, cherry flesh can make their stomach upset. 27 / 30

Why conkers are highly poisonous to dogs. They contain a chemical called aesculin - found in all parts of the horse chestnut tree, including the leaves - which is toxic to dogs 880 Tanager Street. Incline Village, NV 89451. (775)831-0433. www.inclinevet.com. POISONOUS PLANTS TO AVOID. There are a number of common plants which may be toxic to dogs and cats and should be avoided. These include: Arum Lily. Autumn Crocus Poisoning usually occurs when horses consume wilted or dried leaves of the red maple. Most poisonings occur in the fall when the bulk of the leaves drop. Control. Maintain a good feeding program for horses and remove red maple leaves and fallen branches from horse enclosures. Do not plant red maple trees in or near horse enclosures. Toxic Principl Dogs and cats can be very interested in your plants and their surroundings. If you have a dog that likes to eat EVERYTHING, use this list as a resource for what is poisonous. However, when in doubt contact your local vet or poison control center. Though not all plants are fatal, some can cause severe [

Equally toxic are cherry (black cherry, chokecherry, and fire cherry) peach and plum trees, all members of the Prunus species. These leaves also produce cyanide when wilted, affecting horses within a few hours of ingestion. To be safe, remove these deadly trees or relocate horses away from pastures or paddocks bordered by or containing them Commonly known as horse-chestnut. All parts of the plant are poisonous, causing nausea, muscle twitches, and sometimes paralysis. Agave spp. Also known as century plant and maguey: The juice of several species causes acute contact dermatitis, with blistering lasting several weeks and recurring itching for several years thereafter. Ageratina. Poison hemlock is a hollow-stemmed biennial, four-feet high, with double compound leaves resembling parsley and a large, white taproot like parsnip. Flowers are showy, umbrella-like clusters and appear in late summer. The poison is a volatile alkaloid, coniine, found in the foliage all season and in the seeds in late summer Many plants are poisonous to equines; the species vary depending on location, climate, and grazing conditions.In many cases, entire genera are poisonous to equines and include many species spread over several continents. Plants can cause reactions ranging from laminitis (found in horses bedded on shavings from black walnut trees), anemia, kidney disease and kidney failure (from eating the. Affects cattle, sheep, horses and pigs. Toxicity - moderately toxic; Poisonous part - New young leaves most toxic, acorns more toxic when green than when mature; Symptoms - Poor appetite, weight loss, diarrhea, increased drinking, increased urination, kidney failure, edema, death. Buckeye or Horse Chestnut. Horse Chestnut

Can Dogs Eat Water Chestnuts? - Animal Hyp

Like all dogs, cockapoos should not eat certain foods such as chocolate, alcohol, avocados, meat or fish bones, certain nuts and certain fruits and vegetables. 1. Chocolate. According to Dog Food Scoop, chocolate poisoning is the most common form of dog poisoning. Chocolate contains caffeine and theobromine, a stimulant also found in cola and tea Plants can cause neurological symptoms as well, and this includes buckeyes and horse chestnuts. Stomach Concerns. Garbage, lead paint, English ivy, English holly, chocolate, medications, poinsettia, iris, Chinaberry, daphne, and pokeweed are dangerous to dogs Honeysuckle Non-toxic Horse chestnut (Aesculus sp.) Young sprouts, nuts Mouth irritation, vomiting, diarrhea. See also sweet chestnut Hosta Non-toxic Hoya Non-toxic Hyacinth Bulb Nausea, vomiting, diarrhea, skin irritation. Name of Plant Toxic part(s) Symptoms Potentially toxic to dogs Orchid Non-toxic Ornamental peppe

How to Identify Edible Chestnuts | HunkerPlants Poisonous to Dogs in the West | The Dog People byBlog - Pure Pet Food

Horse chestnut trees: Its bark, leaves, flowers, and conkers are all poisonous to pets. Conkers themselves could also be a choking hazard. Conkers themselves could also be a choking hazard Difference between Chestnuts and Conker. One thing we need to understand is that chestnuts are sweet and they are edible but conkers or horse chestnuts are poisonous, and they are not for eating purposes. Horse chestnuts may look very desirable to eat but it is toxic, and it can even cause paralysis The usual dose of horse chestnut in capsule form is 1 capsule every 12 hours before a meal. Take the capsule with a full glass of water. Do not crush, chew, break, or open a horse chestnut capsule. The Chestnut: A Horse's Fingerprint The size, shapes, and growth patterns of Chestnuts are so unique to each horse that they have been nicknamed a horse's fingerprint. They are typically the size of a large thumbnail. Some have jagged surfaces, while others stay smooth. Over time they can thicken and be peeled off Trees that are toxic to dogs. Care should be taken with dogs around two of autumn's best-loved trees, the oak and horse chestnut. The acorns and conkers they produce (or their leaves) could make your dog very ill if he chomps down enough of them. However, severe cases of poisoning are rare