Currently on the lookout for a new working dog as I only have 1 at the minute and she's starting to slow down. The one I have at the minute I trained myself and she's of a good enough standard for what I need from her. I don't want to buy a pup as I don't have the time presently that it would take to train it up. So Im looking at purchasing a trained sheepdog. My question is what exactly would you want to look out for when buying a trained dog and how likely would a trained dog be to work with a new owner? They don't come cheap.