Plain bread — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
A plain piece of bread is not toxic, but it is empty calories. Never give raw bread dough — it rises in the stomach and ferments into alcohol.
Short answer
Yes, a small piece of plain bread is not toxic to cats. It's essentially empty calories with little nutritional benefit for them, but a tiny amount won't harm a healthy cat. The real danger is raw bread dough, which can expand in the stomach and produce alcohol. Just monitor your cat, and if you notice any unusual lethargy or bloating, give your vet a call.