when you next run it only slip it on the rabbits you really think it has a chance of catching ones that are sitting well out on the lamp or better still take it ferreting and allow it to mouth a few in the nets, if it seems keen leave a few nets off the side bolt holes and stand the pup over the top of the warren, hoping for a bolt right in front of it. Under those circumstances, most young dogs will come good and grab the bunny first chance they get. Dont bother with rats, it may get bitten and put off even more. If you want to try it on rats do that at a later date once its catching bunnies