Louie is 6 months old. We've started noticing some funny things going on with his hind legs when he's running around in the yard. I can't quite put my finger on what exactly is unusual about his gait...but something is definitely up. I just did a little research and discovered (to my dismay) that he could be showing signs of hip dysplasia already. What should I have my eye out for? Also, what could it be other than hip dysplasia?