So when Thunder had his check up a couple weeks ago, the vet said overall he's in good health, but his weight (he exaggerated) is equivilant to a 150lb 5th grader! Lol He said he needs to start some training and that he needs to tone it up. I got the bill in the mail the other day and in the comments it said "large body and tiny legs"!!! Lol I need to get him in shape, any ideas to build leg muscle besides hills....as I don't have any. Even when I wasn't slacking on his excercise he never really seemed to build back leg muscles. Am I worrying too much or should I be on a strictor schedule?