Our Kozi has been with us for a couple of weeks now and for a 7 year old rescue dog, he is the perfect gentleman. Good around the house and quiet. Potty trained and crate trained. He walks well on a leash. However it is apparent that he has never received any type of obedience training. I just want the fella to learn sit, down, stay and come. I have trained a few dogs before, just never one this old or a Sheltie so wonder if anyone has any good tips about obedience e training an older Sheltie?