Quick Answer

Peanut Butter (No Xylitol) is safe for your Small Pets. A tiny amount of clean, xylitol-free peanut butter is safe for rats, mice, and hamsters as an occasional high-energy treat, delivering protein and healthy fats. Rats especially benefit from the extra calories during growth or recovery. However, rabbits and guinea pigs must never have peanut butter because the high fat disrupts their herbivorous cecal fermentation, leading to deadly GI stasis. For pocket pets, the sticky texture can pouch in hamsters, so extreme portion control and a smear rather than a blob is vital. Always confirm the absence of xylitol, which is lethal to small mammals in minute doses.