I have a 7 month old Lab Pup who has problems. I owned his mother who was lost about 2 months ago, so he is my last of the line. He has developed serious problems and can hardly get around. After laying down for a while he can hardly get up, being so stiff in the rear and back. He also seems to hurt in his front feet after walking a bit and shakes his head occasionally like there is a problem there also. My vet is stumped. We took x-rays that didn't reveal any problems in the back and rear bone structure. He doesn't think it is hip dysplasia, which is common to the breed, due to the dogs young age and the x-rays. The x-rays should have also shown any problems that might be a result of his having been hit by a car. Cranial cruciate ligament rupture seems to be out due to his having problems all over. The Doc prescribed Rimadyl but it doesn't seem to have helped. I have owned and raised several dogs over the years but have never seen anything like this. Any ideas would be appreciated.