You know that grapes and raisins are off the menu, but so are onions, garlic, avocado, and anything containing the sugar substitute xylitol, warns both Dr. Ryan and Dr. Hohenhaus. Find out more!

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.

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.

Candy

Keep the candy bowl far away from your dog. Eating significant amounts of sugary, high-fat sweets can give dogs pancreatitis, even though symptoms may not show for two to four days. Look out for decreased appetite, diarrhea, lethargy, and abdominal pain.

Peaches

The flesh of a peach is a great source of fiber and vitamin A, but the pit contains cyanide. Cyanide interferes with cellular oxygen transport, preventing your dog’s blood cells from getting the right amount of oxygen.

Signs of cyanide poisoning include dilated pupils, red gums, and difficulty breathing. Other pitted fruits like cherries and plums pose the same problem. Be sure to cut the fruit into small pieces before feeding your dog.