so what size loops, and how high off the ground are you hanging the snares-
what you are descibing, is the exact type of refusals I too often get, setting legal snares.
Rally Hess gave me this tip- place a "jump stick" over the trial- but not where you hang the snare. place the stick up or down the trial, 10-15 feet away from the snare- coyotes are single minded, and placing the stick away from the snare, focuses their eyes on the stick down the trial, not the snare