We have two Weimaraner puppies that will grow to be close to 100 pounds. Before Mark, they were jumping, chewing and digging holes in the yard. After the private in-home lessons, we have well behaved members of the family. Mark was thorough, understanding, easy to work with and flexible with our schedule. He has amazing technique and we are so glad we invested the time for these lessons. He has taught us lessons that we will be able to use and refer back as they grow. Look no further if you're trying to find someone to help with your training.