Please keep your cats inside. Most ecosystems aren’t supposed to have near-apex predators running around killing everything. Outdoor cats kill over 2 billion birds a year.
That’s a bit cruel. One compromise is to put a small bell on their collar.
Bells on collars work, as does switching cats on to a premium, high-protein food diet, and giving them mental stimulation by playing with them in the morning. “Changing the cat’s food can reduce the amount of wildlife they kill by over a third,” says McDonald. “And playing with your cat, more than a quarter. These are positive actions for the cat that also have a positive outcome on their behaviour.”