Dave Skoletsky (dave@sitmeanssit.com), who runs our Denver dog training branch of Sit Means Sit, is seen here with a very small, fear aggressive dog making a big transition during one of our free demonstrations for a client. The Sit Means Sit dog training system, can make dramatic changes with just about any dog, and in a very short period of time in a non-confrontational way. If you would like a free demonstration with YOUR dog, then contact a Sit Means Sit dog trainer in your area.