Grapes
Grapes are a simple healthy snack for humans, but they are toxic to dogs. Eating them can make your pooch vomit or lose his appetite. If your dog shows signs of diarrhea, abdominal pain, depression, or tremors, his kidneys could be failing. And yes, raisins are just as bad.
Onions
Cooked or raw, onions contain thiosulphate, a substance that causes your dog’s red blood cells to burst in a condition called hemolytic anemia. Symptoms include diarrhea, vomiting, breathlessness, and lethargy; it could take two to four days for them to become noticeable. You also put your dog at risk if you give her certain foods that are made with onions, like pizza or tomato sauce, which could trigger the same reaction.
Coffee and Tea
Onions
Coffee and Tea
These drinks—and really any form of caffeine—can give animals hypertension, abnormal heart rhythms, hyperthermia (increased body temperature), and seizures. A few laps of spilled coffee won’t poison your dog, but ingesting moderate amounts of coffee grounds and tea bags can kill small dogs.