blitz it with some cooked garlic n dash port and cream ground pepper , then cover with melted butter ,put in fridge hey press toe
You need to put your foot down, mate. They're collies - sheepdogs. Their natural diet is Stuff They Found In The Hedge.
Caught ours just about to tuck into a nice dead owl once I like the guilty look they give you over their shoulder - "Whaaat...I know it's gross, but I have to do this..."