All of my dogs were trained using positive reinforcement, just the classes at Petco/Petsmart. I taught them all tricks using a clicker, Nebo and Keva know a ton of tricks and they caught on fast (they are very food motivated). Skya and Killer are also food motivated but not as smart so they don't know too many ha ha. I have a couple of prong collars I have used for walks, not training, but the huskies have fur so thick they barely feel it. However I haven't used those in years I had one pop open a couple of times and it scared me I was afraid I'd lose a dog so I don't use them now. I've never used any sort of choke/prong/shock collar for training I don't see the need to and I would consider my dogs well behaved. With the exception of not being able to let them off leash (the huskies, Killer does fine) but that's not their fault that's a breed trait and honestly I've never tried to train them to be good off leash because everything I've ever read said not to even try it with huskies. Their desire to run/prey instinct is too strong.