Cat Food

The protein and fat levels in cat food are too high for your dog. Feeding a dog cat food could lead to an upset stomach, obesity, and pancreatitis.Cherries
The flesh part of cherries is okay for dogs to eat but the seed and cherry plan contain cyanide, a substance highly toxic to dogs. Cyanide disrupts cellular oxygen transport, leading in your dog’s blood cells not getting enough oxygen. Cyanide poisoning will result in symptoms like dilated pupils, difficulty breathing, and red gums.

Chewing gums

Chewing gums often contain xylitol, a highly toxic substance for dogs. See Xylitol in this list to learn more.

Chives

All foods from the onion family are to be avoided. See onions to learn more.

Chocolate

This might be the most known “no-no” in the toxic-for-dog food list. Chocolate contains substances called methylxanthines, found in the cacao seeds, which are very dangerous to a dog’s health. When ingested by dogs, methylxanthines can cause vomiting and diarrhea, panting, excessive thirst and urination, hyperactivity, abnormal heart rhythm, tremors, seizures and even death. The darker the chocolate, the more methylxanthines it contains.

Cinnamon

Cinnamon is not toxic to dogs per se but it can irritate the inside of dogs’ mouths. It can also lower a dog’s blood sugar so much that it leads to diarrhea, vomiting, increased, or decreased heart rate, and even liver disease.

Citrus

Citric acid is present in the stems, leaves, peels, fruit and seeds of citrus plants. It can cause irritation and possibly even central nervous system depression if ingested in significant amounts. In small doses it is fine and should not present problems beyond minor stomach upset.

Coffee

Coffee contains substances called methylxanthines, which are very dangerous to a dog’s health. When ingested by dogs, methylxanthines can cause vomiting and diarrhea, panting, excessive thirst and urination, hyperactivity, abnormal heart rhythm, tremors, seizures and even death.

Garlic

Garlic can cause gastrointestinal irritation and could lead to red blood cell damage. It can create anemia in dogs, causing side effects such as pale gums, elevated heart rate, weakness, and collapse. The effects of garlic poisoning can have delayed symptoms so if a dog has eaten some it is necessary to monitor it for a few days.

Grapes

Recently, veterinarians have discovered that grapes can cause kidney failure in dogs without identifying which substance is responsible for this reaction. Raisins should also be avoided for this reason also.

Macadamia nuts

Those are the most poisonous nuts for dogs. Consuming them can cause vomiting, weakness, depression, increased body temperature (hyperthermia), inability to walk, lethargy and affect the nervous system.

Nuts

Nuts, including almonds, pecans and walnuts, contain high amounts of oils and fats, which can cause vomiting, diarrhea and even pancreatitis in dogs. Almonds are a choking hazard (see “Almonds” above) and Macadamia nuts are a huge no-no.

Persimmon, Peach & Plum Pits

Pits and seeds from peaches, plums and persimmon have cyanide, which is poisonous to dogs.

Onions

Onions, leeks, and chives are part of a family of plants called Allium that is poisonous to dog, and most pets, and should never been consumed in any formed (cooked, raw, powder…). They can lead to red blood cell damage, making them rupture. In less severe cases a dog can also experience vomiting, diarrhea, stomach pain, and nausea. Signs of illness can appear several days after consumption and dogs should be monitored if you suspect they ate any.

Raisins.

See Grapes.

Xylitol, an artificial sweetener

Xylitol is a type of artificial sweetener found in many sugar-free products, from candy to nut butters. It creates an insulin release in dogs, which can lead to liver failure, blood clotting, seizures and brain damage. Always check the label for anything claiming to be “sugar free” or “no sugar added”, as this is a clue for the possible use of Xylitol in a product.

Yeast

Yeast will expand in a dogs’ stomach the same way it rises in bread. It can lead to gas, lots of farting, and discomfort. In the worst cases it could rupture their stomach and intestines. Also, yeast can ferment in the dog’s stomach and create alcohol, leading to alcohol poisoning.