Foods that are hazardous to dogs

Avocado

Avocado leaves, fruit, seeds and bark may contain a toxic principle known as persin. The Guatemalan variety, a common one found in stores, appears to be the most problematic. Other varieties of avocado can have different degrees of toxic potential. In some dogs and cats, mild stomach upset may occur if the animal eats a significant amount of avocado flesh or peel. Ingestion of the pit can lead to obstruction in the gastrointestinal tract, which is a serious situation requiring urgent veterinary care.

Bread Dough

Raw bread dough made with live yeast can be hazardous if ingested by dogs. When raw dough is swallowed, the warm, moist environment of the stomach provides an ideal environment for the yeast to multiply, resulting in an expanding mass of dough in the stomach. Additionally, the expanding stomach may press on the diaphragm, resulting in breathing difficulty. Perhaps more importantly, as the yeast multiplies, it produces alcohols that can be absorbed, resulting in alcohol intoxication. Affected dogs may have distended abdomens and show signs such as a lack of coordination, disorientation, stupor and vomiting (or attempts to vomit). In extreme cases, coma or seizures may occur and could lead to death from alcohol intoxication.

Chocolate

Dogs should not have access to products that contain chocolate, such as chocolate candy, cookies, brownies, chocolate baking goods, cocoa powder and cocoa shell-based mulches. The compounds in chocolate that cause toxicosis are caffeine and theobromine, which belong to a group of chemicals called methylxanthines. The rule of thumb with chocolate is "the darker it is, the more dangerous it is." Depending on the type and amount of chocolate ingested, the signs seen can range from vomiting, increased thirst, abdominal discomfort and restlessness to severe agitation, muscle tremors, irregular heart rhythm, high body temperature, seizures and death. Dogs showing more than mild restlessness should be seen by a veterinarian.

Ethanol (Also Known as Ethyl Alcohol, Grain Alcohol or Drinking Alcohol)

Dogs ingesting a small amount of a product containing alcohol can cause significant intoxication. Dogs may be exposed to alcohol through drinking alcoholic drinks, such as beer, wine or mixed drinks (those with milk, like White Russians and "fortified" egg nog, are especially appealing to dogs). Alcohol intoxication causes vomiting, loss of coordination, disorientation and stupor. In severe cases, coma, seizures and death may occur. Dogs showing mild signs of alcohol intoxication should be closely monitored, and if so inebriated that they can't stand up should be monitored by a veterinarian until they recover.

Grapes and Raisins

Grapes and raisins have recently been associated with the development of kidney failure in dogs. At this time, the exact cause of the kidney failure isn't clear, nor is it clear why some dogs can eat these fruits without harm, while others develop life-threatening problems after eating even a few grapes or raisins. Dogs experiencing grape or raisin toxicosis usually develop vomiting, lethargy or diarrhea within 12 hours of ingestion. As signs progress, dogs become increasingly lethargic and dehydrated, refuse to eat and may show a transient increase in urination followed by decreased or absent urination in later stages. Death due to kidney failure may occur within three to four days, or long-term kidney disease may persist

Hops

Cultivated hops used for brewing beer have been associated with potentially life-threatening signs in dogs who have ingested them. Both fresh and spent (cooked) hops have been implicated in poisoning dogs. Affected dogs develop an uncontrollably high body temperature (often greater than 108 degrees Fahrenheit), which results in damage to and failure of multiple organ systems. Dogs poisoned by hops become restless, pant excessively, and may have muscle tremors and seizures. Prompt veterinary intervention is necessary to prevent death in these dogs.

Macadamia Nuts

Although macadamia nut toxicosis is unlikely to be fatal in dogs, it can cause very uncomfortable symptoms that may persist for up to 48 hours. Affected dogs develop weakness in their rear legs, appear to be in pain, may have tremors and may develop a low grade fever.

Moldy Foods

Some mold produce toxins called tremorgenic mycotoxins, which can cause serious or even life-threatening problems if ingested by dogs. Promptly remove any trash or moldy debris (road-kill, fallen walnuts or fruit, etc.) from your dog's environment to prevent him from eating it. The signs of tremorgenic mycotoxin poisoning generally begin as fine muscle tremors that progress to very coarse total-body tremors and, finally, convulsions that can lead to death in severe cases. Left untreated, these tremors can last for several weeks.

Onions and Garlic

All close members of the onion family (shallots, onions, garlic, scallions, etc.) contain compounds that can damage dogs' red blood cells if ingested in sufficient quantities. Garlic tends to be more toxic than onions. The damage to the red blood cells doesn't become apparent until three to five days after ingesting. Affected dogs may seem weak or reluctant to move, or they may appear to tire easily after mild exercise. Their urine may be orange-tinged to dark red in color. These dogs should be examined by a veterinarian immediately. In severe cases, blood transfusions may be needed.

Xylitol

Xylitol is a non-caloric sweetener that is widely used in sugar-free gum, as well as in sugar-free baked products. In dogs, ingestion of xylitol can lead to a rapid and severe drop in blood sugar levels. Dogs may develop disorientation and seizures within 30 minutes of ingesting xylitol products.

For a more detailed explanation see:

https://www.aspca.org/pet-care/animal-poison-control/people-foods-avoid-feeding-your-pets