The Dapper Duck
Songster
Almost no experience with furbearers. Got a fox easily last year (see post #47 https://www.backyardchickens.com/threads/red-fox-in-barn-at-0415.1244409/page-5.) Will be getting a good number of muskrats and possibly a couple of otters as the production season progresses.
Try cruising through some trapper forums for more set ideas. Maybe whatever you are using this guy isn't into. Off the top of my head, if this fox is used to taking birds, try adding in a dirt hole set, throw some raw chicken in the hole, and stuff some feathers in the opening and sprinkle a couple on the backing. Might garner some interest.