Had that injury dog never made a recovery it's a twat of an injury to happen. They never run or work properly again, both vets told me this. However I think if they do come back high risk of arthritis and a long time out. Alb mate
Iv owners and worked both. Coursing dog x bull grey don't think you can go wrong if you genuinely want to ruin anything you bump into. Bred right. But on the other hand the collie bull cross put plenty away and lads swear by them. Maybe something with all three in the mix is the way to go....
Beddy/whipp x whipp/grey seen a 21" dog of this cross bag plenty of bunnies, ferret, and also had the balls of a lion. Maybe he was a one off. But a cross that sounds like would suit you perfect