Cats can technically have peanut butter, but it is generally not recommended. Peanut butter offers no nutritional value for cats, who are obligate carnivores and rely on meat for their dietary needs. Additionally, peanut butter can pose several health risks for cats, including being high in fat, sodium, and calories which can contribute to weight gain and other health issues. Peanut butter also carries risks of choking due to its thick consistency, and many brands contain additives like xylitol, which is toxic to cats. Some cats might also be allergic to peanuts, causing symptoms ranging from mild skin irritation to severe anaphylaxis. If given at all, it should be a very small amount, infrequently, and only if it is xylitol-free. Peanut butter is sometimes used as a way to help administer pills, but there are better alternatives for treats and medication administration for cats. In summary, while peanut butter is not outright poisonous to cats, it is best to avoid giving it to them due to the potential health risks and lack of nutritional benefits. If a cat does get a taste, it should be very limited and monitored for any adverse reactions.