I have been feeding one feral for about 7 months, and a second cat is now coming to eat every day. Unfortunately, a coyote started showing up two nights ago. (I am using a trail cam to monitor what goes on, so I'm pretty sure it's only just started coming around.) How can I scare off the coyote without also scaring away the cats? (These cats are both extremely shy; there's no way I can get them inside, which would be my preferred solution.)