Yes he will come back, but a little more wary. At residential ranges a .22 LR with hollow points is sufficient. Coyotes aren't as hard to kill as deer, and I don't care about DRT with them. After the neighbors lose enough pets, they become less touchy about a shot at night. A pickup truck with a camper shell makes a good blind, and if you sit far enough back the shell dampens the blast a bit. Earplugs are a must. To keep them in the limited field of view, I use a couple of fried chicken legs securely zip-tied to the end of a bungee cord and hung ~5ft. up. They seem to find that entertaining. If they are hanging around houses, they are used to table scraps. Also useful is a very low powered BB gun loaded with RWS .177 lead balls, for when Fido tries to steal the bait. No real damage, and little noise, but a lasting lesson. Binoculars can be useful to make sure of your target.