Thank you everyone for your responses, the trap is set and the guns are loaded !!! So far it hasn't been back but that weasel isn't gonna weasel out of this one !
Lost four, month old chicks, in with banty mother, three survived but the mother is also gone. Space under coop the 2" side of a 2x4 which I had blocked with a 2x4 so the babies would not get out from under. Something moved the board, got under that small space and inside coop, there was a...