Is your run pretty weak? Foxes are very lightweight animals and something that is crushing any decent run is unlikely a fox. Maybe coyote or dog.
Catching a fox or coyote with dead meat is a low-success attempt at trapping when there is live meat nearby. Use it's desire to get into the cage as your advantage. Provide an opening into the run through the trap.
Catching a fox or coyote with dead meat is a low-success attempt at trapping when there is live meat nearby. Use it's desire to get into the cage as your advantage. Provide an opening into the run through the trap.