I always find bolting rabbits with ferrets is the best way to get some easy catches ,
Dogs that yip do so out of frustration and like blackmag says you got to pick your runs and put the odds in the dogs favour when lamping ,
I Was always told start a pup ferreting before lamp and let it feal some easy wins and I've never had a problem with dogs yipping,but I've seen dogs yip that have been lamped or run on hare because the dog had no chance of catching .