My 15 month old cocker bitch has started hopping / missing a step with her rear right leg. It's not ever when she is at walking pace or at full tilt but at a lazy trot the leg just seems to miss a beat and she doesn't seem over bothered about it.
However, if I lay her on her back she will let you pull / push / part the pads of the other three feet but pulls back slightly when I try and do the same on the "suspect" foot. I've checked for cuts, thorns, grass seeds (bloody things) etc and can't find anything different.
Trip to the vet maybe - or any suggestions please?