Coyotes will usually tear the fox out ,not chew on them to break them free.No different than what coyotes do to them whether in a trap or not .The fox will be shredded to pieces either way unfortunately.
That doesn’t happen .99% of the animals I catch I can also release .The chewing legs off is anti BS lies .More animals are injured yearly by bow hunters than any trap .
Just brush out an area and set .be prepared to get frustrated watching the tracks go up to your sets and walk away .Fisher-you will just have to release them.No way around it .Never had to worry much about fisher until the last few years.