I have a 5 month old black lab mix who was jumping up to all my guests, nibbling at everyone and even destroyed my living room one time when he got out of his crate while i was at work. I tried positive reinforcement treat training him but that wasn't working then decided to give American K9 a try. Best choice i could of made. Bob is such a great down to earth guy. Immediately after the first week, i noticed a change. My pup was behaving fine and still his happy self. My friends and guests noticed as well. Making it great for me to take him out in public without the fear of him causing harm to anyone. There isnt any pulling on the leash anymore when i walk him and just a total flip around in just 4 weeks. I was amazed in the short amount of time versus other trainers requiring you to attend multiple classes or large group classes. Bob came and worked with me and my dog just 1 on 1 and answered every question i had as well as clarified the whole process of the training with me. Overall, great experience and very effective in a short amount of time.