he's 14tts mate and he's mad for bushing loves doing the rats and bunnies he bushed a few other things as well which were left to run from 7months old hes been bushing and will go into any cover no matter how thick hes my first terrier so not to sure about spanning him Ive looked it up on the net and if i'm doing it right behind his front legs there's a inch gap between my thumbs ATB