I just rescued a TB gelding who, 7months ago cracked his elbow, he isn't sore and the vet said he can start back into light w/t work for a while. She said no circles though. What can I do to keep a 15-20min work out interesting and positive? I rode him for the first time a week ago and we just walked for about 8 mins trotted twice around the ring both directions. But I would like to know if there's other things I could do with him. Any suggestions?