Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual
Yes, any exposure is dangerous. Protein bars are high-risk for cats because they often contain xylitol or chocolate, both of which are toxic. Spoilage adds bacterial risk, but the primary threat is the ingredients themselves. If you suspect your cat ingested any amount, call the ASPCA Animal Poison Control Center at 888-426-4435 immediately for guidance. Do not wait for symptoms to appear.
Do not feed · Cats · full breakdown on the linked food page
Very often sweetened with xylitol or coated in chocolate. Treat every bar as toxic until you read the label.
The full verdict, portion guidance and serving notes are collected on the Protein & energy bars food facts page.