Have. 6 year old lab who is generally well and in good health. This evening he has suddenly started to limp. Seems to be back left leg. Leg seems really stiff and he is reluctant to walk and put any weight on it. I am beside myself and will obviously phone the vet in the morning but has this happened to anyone else? Have checked his pads and legs etc and cannot see any cuts or obvious signs of injury. He is normally a very active boy so this lethargic state is very worrying. He didn’t even try and steal my food 😥