I have a St. Bernard and a Mastiff who are both very skittish when they meet new people. When Jack came to my home the first time he was very calm, cool, and collected at the initial meeting. The dogs warmed up to him quicker than I have ever experienced them warm up to anyone before. I left a long list of things that needed to be done to take care of my babies and it was all done to a T. When I came home the dogs seemed happier then they usually do with me. I would recommend Jack to anyone who is looking for a dog walker/sitter. His character, integrity, and care for dogs is clear. I only have used Jack to watch my dogs from that point on.