hi everyone! my bun is an outside rabbit and I really want to make sure he's getting enough exercise. he has a hutch and run. I was thinking about taking him out on a leash. I currently have one that I use occasionally. he seems to enjoy running around while I follow behind him. what do you guys think about leashes? he seems fine with it. how often can I take him out on it? we usually just stay in the yard. attached is a pic of his current leash. ( he doesn't fit into the regular fabric harnesses). all advice appreciated!