My lovely little choc lab, Rolo, has started limping. She is just 3 months old and we have noticed for a week or 2 now that she runs 'funny' and seems to be a bit lobsided as though her legs don't all work in the same way. She always looks as though she has to drag her back legs up when she stands from laying and seems lethargic as the day progresses.
I know I need to see the vet and have an appointment for next week but looking around on the net the symptoms seem to look a bit like skeletal muscle myopathy (http://www.labbies.com/hmlr.htm). I sure hope not.