A cat that hunts doesn't stop hunting because it's fed twice a day, and a bell is one of the few cheap things that measurably changes the outcome rather than just making an owner feel better about it.

This is a small warning bell that attaches to an existing cat collar, giving an audible jingle while the cat is hunting. RSPB research found that a cat wearing a collar bell catches 41% fewer birds and 34% fewer mammals.

• Small warning bell for a cat collar
• Gives an audible warning while hunting
• RSPB data: 41% fewer birds caught
• RSPB data: 34% fewer mammals caught
• Fits onto an existing collar

On the numbers. The 41% and 34% figures come from RSPB research, not from Ancol or us, and they're population-level findings rather than a guarantee for any individual cat — some cats do adapt to hunting quietly around a bell over time.

Who it's for: owners of a cat that hunts, wanting a cheap, low-effort way to reduce — not eliminate — how much wildlife it catches.