My little boy turned 4 months old today, weighing roughly 33 lbs. And I have been reading up a lot about hip dysplasia. I was wondering when you get your dog tested for it? I know there are a lot of people who wait until they start seeing signs of it.. as in.. hard to get up and walk.. not using back legs, etc.. I was just wondering if they would be able to see any signs of it at all.. very early? I just want to make sure IF it ever happens.. that I want to be able to catch it early on so I can try to do everything I possibly can before having to pay out $8-9k for hip replacements.. any suggestions would be nice. Thank you for your time.