personally I would wait for next season, the ground is hard and fast this time of year, and favours the bunny. There is no rush, and you could ruin a potentially good dog if it doesnt see some success early in its career. If you do persist then see if you can spot a mixyed rabbit.
Good luck and remember time is on your side.
By the way you dont mention how old the dog is? If it s a pup then defo wait. . .