My cat wasn't supposed to be an outdoor cat. Plenty of humans and a whole interactive dog to play with inside. After Khan Kitty bent/broke six window screens, however, we surrendered to the inevitable and began taking him outside on a harness and leash, with the leash turning into a long line. Even on a lead, Khan CAUGHT A BIRD in our backyard. We were able to free the finch and it flew away, but wanted to make sure Khan never caught one again. One of his kitty cousins on the East Coast wears the Birdsbesafe collar, so we ordered the Rainbow Sally and put it on Khan's harness. He's caught no birds while wearing the Rainbow, whether it's on his harness for walks or his collar when playing in the yard. He has, however, caught the pocket gopher destroying our butterfly garden, 2 rats, and about 8 mice. While Khan can no longer sneak up on birds, the Rainbow Sally doesn't stop Khan from serving as rodent pest control.