As with kids, two is always harder than one, especially if they are puppies, siblings and the same age. I have trained and raised multiple dogs and was always able to manage just fine, but as aforementioned two at the same time was near impossible. Enter Mark Siebel. Mark is not only a great guy but an amazing individual who had our household pegged in the first meeting and was able to create a lesson plan that truly showed results. Our two dogs are two and a half years old now and thanks to Mark and our Friends at the D Pet Hotel in Scottsdale (where the go to doggie day care twice a week for daycare), the most lovable and well adjusted dogs I have ever owned. I hold Mark in the highest regard as an individual and his skill set is second to none.