We rescued a 9 month old out of control chocolate lab. This guy hated his kennel (barked) but loved getting into all sorts of trouble. The dog shock collar is what was needed to help us tame our strong headed dog. Needed mainly to keep him from jumping on guest because he wants to say hi. Dogs are smart so this method of breaking a bad habit works fast. The barking in kennel solved, but still working on greeting guest with paws on shoulders.