Verdict: In moderation
Peanut butter itself is not toxic to cats, but many brands contain xylitol, an artificial sweetener that is highly toxic to pets. Xylitol can cause a rapid drop in blood sugar and liver damage, requiring immediate veterinary attention. Due to the high fat content, even xylitol-free peanut butter can cause digestive upset like vomiting or diarrhea in cats.
Xylitol causes a rapid and potent release of insulin in dogs, leading to a sudden drop in blood sugar (hypoglycemia) and potential liver damage. While cats are generally considered less sensitive to xylitol than dogs, its effects are still a concern and can be toxic.
xylitol