I love nilf! I start on prong collar, I flip it around on the pups and them once they are used to it and about 6 months I flip in prongs in. My kids have actually done all the training with Maddie. They can walk her and she is amazing with them, they are 5 & 11. They even have taught her to play dead. My 5 yrs olds chores are to feed, water and let them out every day. He has been doing this since he was 2.