Its still a pup mate , have you been letting it chase rabbits down the side of hedgerows that it has no chance of catching ? that will soon sicken it mate , give it time , if you get it out ferreting make its first few rabbits as easy as possible , as said maybe take it out with another dog and let jealousy play its part , you said youv got it for life , so whats the hurry / enjoy it and don't dwell on what it cant do ,atb