Is peanut butter safe for dogs?

The xylitol problem

Xylitol is a sugar alcohol used as a sweetener in gum, candy, some baked goods, some medications, some cough syrups, and increasingly in 'sugar-free' or 'natural' nut butters. In dogs, xylitol triggers a massive insulin release that causes life-threatening hypoglycemia within 30 minutes and, at higher doses, acute hepatic failure within 24-72 hours. As little as one piece of xylitol gum can kill a small dog.

Peanut butter brands most commonly implicated include several 'natural' and 'no-added-sugar' labels; brand-checking any given jar the day of purchase is the only reliable safety step. Never assume a previously-safe brand is still safe, formulations change quietly.

Safe use of xylitol-free peanut butter

• Read the ingredient list every time, look for peanuts, salt, and possibly palm oil. Any 'sweetener', 'sugar-free', 'reduced sugar', or 'birch sugar' means check for xylitol.
• Portion control: 1 tsp for a small dog, 1 tbsp for a medium dog, 2 tbsp for a large dog, max, and count it toward daily calories. Peanut butter is calorie-dense and fatty, over-use contributes to obesity and pancreatitis.
• Great uses: lick mat for grooming or nail trims, Kong stuffer, medication vehicle for pills that need to be swallowed whole.
• Avoid if the dog has a history of pancreatitis, is overweight, or has a peanut allergy (real but uncommon).

If your dog ate xylitol

Call ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) immediately, even if the dog seems fine, hypoglycemia and hepatic damage develop over hours. Bring the product wrapper. Do not wait for symptoms; xylitol has one of the fastest deterioration curves in canine toxicology.