Well, i dont think its lack of drive.
Lurcher bitch caught a fox yesterday and Ollie was so desperate to get to them that he smashed his way through an acre of gorse and bramble and after she lost hold of it and it got away up the mountain he hunted it at full pace for a further 10 minutes. The result of that is that he was do stiff this morning that i left him at home and he missed her catching another one today, which didn't escape.
Back home next week to embark on a round of vets, bonemen and physios to try and put him right. Still think a pup is on the cards though.