Gum can be fatal to dogs when eaten. Many gum brands contain xylitol, an artificial sweetener that is toxic to dogs. Xylitol causes a dog's blood-sugar level to drop to critical levels. More »

The nicotine in cigarettes is toxic to dogs and can be lethal, depending on the dosage, so cigarettes should be kept out of reach for dogs at all times. The exact dosage of nicotine that can cause harm to a dog depends o... More »

www.reference.com Pets & Animals Pets Veterinary Health

If a dog eats Advil, or ibuprofen, toxicity can occur. Advil can inhibit effective blood flow to the dog's kidneys and cause significant stomach irritation, according to Vet Street. When stomach irritation becomes severe... More »

Some foods harmful to dogs include avocado, chocolate, grapes and raisins, macadamia nuts and xylitol from sugar-free gum or sugar-free baked goods, notes the American Society for the Prevention of Cruelty to Animals. Al... More »

According to the ASPCA, when dogs eat members of the onion family, such as shallots, onions, garlic and scallions, there is sometimes damage to red blood cells. Small amounts are typically not harmful, but larger portion... More »

Fishy breath in dogs is often a symptom of causes that include gum and tooth problems, according to Petco. Issues like rotting teeth and periodontal disease cause foul-smelling breath as a direct result of infection and ... More »

If a dog eats Advil, or ibuprofen, toxicity can occur. Advil can inhibit effective blood flow to the dog's kidneys and cause significant stomach irritation, according to Vet Street. When stomach irritation becomes severe... More »