Headless ducks

Have lost two ducks in the past week at the pond at the farm. Only missing heads. No chickens have been disturbed and the coop is right near the pond. Could this be a mink? If so how would you go about trapping it?

Coon and mink leave that trademark at times.

I've caught them by using a piece of the same bird in the back of a cage. I can't imagine that some fish flavored cat food wouldn't

catch whatever it is.