My old Rottie Chunk used to love a good sheep head to chew on, raw. That’s the only use I can think of for them. He always went for the brains first and left the jaws and teeth (can’t blame him for that).
Recipes for tripe?
Rusty
#22
I bet no one ever thought about breaking in with Chunk chewing on a raw sheeps head in the front garden!
Shortstuff
(Allie)
#23
I think they’d be more scared of me tbh 
There was one time though, couldn’t get rid of a double glazing salesman who was pacing up and down the street pouncing on people and repeatedly tried hassling me. I used to get my raw dog food delivered back then and he saw me come out to take a box into the house so came back over for another try hassling me. He peered into the box being nosy and asked what it was, I told him it was the last salesman who wouldn’t take no for an answer - he left, quickly, and I carried my box of beef ribs into the house.