Have been letting Ace watch me working with Chet, and get the idea he belongs here. Work with them in view of the other and while the oxcytocin is flowing have them in proximity. Taught Ace to heel on right and would have chet on left. Have let them interact a few times under extremely close supervision. Ace has shown tolerance. 

Wanting to get them used to closer proximity hooked chet up to cart in a whoa. Everytime Ace got stressed remove him until he got calmed down. Third and last attempt to hook up Ace remained calm.