Contains caffeine and theobromine a dog cannot metabolize this as fast as humans can and the more theobromine the chocolate contains the more poisonous it is to your dog. Symptoms are vomiting, diarrhea, tremors, high blood pressure respitory failure and even cardiac arrest.
Grapes & Raisins
It's not clear why some dogs can tolerate grapes and others cannot but their toxicity can cause problems so its best to avoid them near dogs. Symptoms of grape poisoning are vomiting, diarrhea, weakness, dehydration, abdominal pain and lethargy within 12 hours of eating. Call your vet if any of these symptoms occur.
Garlic & Onions
Garlic, chives, and leeks are also part of the Allium family, and are poisonous dogs. Garlic is considered to be about five times as potent as onions. Symptoms nausea, oral irritation, drooling, abdominal pain, vomiting, diarrhea). Other clinical signs of anemia may be seen, and include lethargy, pale gums, an elevated heart rate, an increased respiratory rate, weakness, exercise intolerance, and collapse. Onion and garlic poisoning may have a delayed onset, and clinical signs may not be apparent for several days. Immediate veterinary care is recommended.
Alcohol is rapidly absorbed into the bloodstream and affects dogs quickly. alcohol can cause dangerous drops in blood sugar, blood pressure and body temperature. The most toxic substance found in alcoholic beverages and is toxic to dogs is ethanol. Cakes soaked in rum for example and similar foods treats containing yeast can result in alcohol poisoning.
Bones & Fat Trimmings
Table scraps often contain meat fat that we will not eat as well as bones. Both are dangerous for dogs. Fat trimmed from meat, both cooked and uncooked, may cause pancreatitis in dogs. And, although it seems natural to give a dog a bone, (give a dog a bone as the old saying goes) a dog can choke on it especially cooked bones. Bones can also splinter and cause an obstruction or lacerations of your dog's digestive system.
Anything with caffeine in it is very toxic for dogs, coffee, tea, coca cola, and energy drinks to name a few. Caffeine poisoning is something that cannot be treated and there is no known cure for this condition. The lethal dose of caffeine for dogs is 150mg/kg body weight, and regular instant coffee contains over 60mg caffeine per teaspoon.