Tipsy, just coming to the end of a long haul with my black lab, 7month old.
He started limping about three months ago. First tried 4 weeks rest. Nightmare. Then tried normal walks. Then had X-rays. My vet is brilliant and said that although he could not see anything on the X-rays, he was sending them over as a referral to an ortho specialist. Said specialist, who I may be a little in love with, immediately said he thought it may be elbow dysplasia.
My pup was MRI'd. He had a lathe chip floating free in his left leg, his right looked okay.
He had his operation to remove loose chip and while he was under, they checked his right leg, only to find a piece about to break away, so they removed that too.
We are now 5 weeks on - no walks for 4 weeks, but the limp has gone, we are taking walks again and slowly building up to getting back to normal.
This is a short to mid term solution. He will develop osteo arthritis sooner rather than later, but this can be controlled with medication, and keeping his weight down.
The best way to imaging what they feel is that it like walking/running with a stone in your shoe, so not nice. Labs are nutters, the fact that they are in pain seems to take so long to sink in....they just keep going.
I have a cat and 4 chickens too, so a puppy that has effectively not been able to walk off his bundle of energy for 8 or 9 weeks has been......interesting....to say the least
Assuming you are insured, get him referred and scanned.the sooner you know, the sooner you can start mending him.
Good luck and feel free to pm me if you need to know anything more.
If you are in the north, I might even share my delicious consultant with you 