This was Coco the 5 month old Shepherd Mix's 1st time on a prong collar. She is lovingly spoiled and was doing ok on her flat collar, but started "protesting" her training so it was time for a little change. As a puppy she is easily distracted, so I brought Mo'i out to make her heel practice a little more challenging. This lap was after a FANTASTIC tantrum because of the new training tool. She's not as happy to work as I'd like to see, and her dad was still getting used to giving her slack in her leash, but overall not a bad recovery AND she's starting to think which is what I LOVE to see!