Most people know that chocolate is a major no-no for dogs. Like sharing your morning coffee or a late night alcoholic beverage, it may seem cute to let your dog taste the food and drinks you’re enjoying, but these and many other items can be toxic and even fatal for your furry friend.

1. Grapes and Raisins

The ASPCA acknowledges that the exact reason grapes and raisins are toxic in canines isn’t clear. Some dogs can even eat them without any issues, but others experience symptoms after just a few pieces of the fruit. Pay attention to your dog’s urination levels. If it increases briefly and then drops or stops altogether, get him to the veterinarian right away. Without care, this can cause death in as quickly as three days.

2. Corn on the Cob

It may seem funny to watch your dog try to get the kernels off a cob of corn, but your pup doesn’t actually care if he eats part of the cob while he chomps on the juicy corn. He’ll digest the corn without problem, but the cob may get lodged in his small intestine. The only way to prevent a fatal blockage is to have it surgically removed.

3. Onions and Garlic

Lump all the relatives of these seasonings into the warning. High concentrations, like onion and garlic powder or onion soup mix, are the most hazardous. Orange or red-tinged urine and weakness are signs of toxicity from these foods.

4. Candy and Gum

Sugar has the same unhealthy effects on dogs as on humans – so consider a natural supplement to replace your dog’s sugar-filled treats. Many treats actually contain xylitol, a no-calorie sweetener that can cause high insulin levels and other severe conditions in your dog. Disorientation can begin as early as 30 minutes to a few hours after ingestion.

5. Bread Dough

Yeast is the culprit, whether in the raw dough or on its own. The moist, warm surroundings of your dog’s digestive tract encourage the yeast to increase and expand. The mound of yeast can affect blood flow to the stomach or prevent the diaphragm from fully functioning, while the expansion produces alcohols that can poison your dog.