Hi I'm a big believer in training pups or young dogs to retreive dummys on the lamp before they go for rabbits, it teaches them all lamping techniques, watching, run the beam, picking sitters , so lamp dummy and send pup, whenever you knock the lamp off call the pup in, no rabbits to scare so shouting is no problem, persevere until penny drops, good luck.
cheers for all the advice lads il start doing it with my bullx pup cheers again