Out for our usual meander to the shops, he always dawdles along behind Mum and suddenly , heard a howl and he was pulling his leg out. 
. Initially we thought he had just skinned his leg but he kept licking it so Mum took him to the vets and it transpired he has damaged ligaments too!! He has a bandage on for however long it takes to heel and he can't manage stairs so we are taking it in turns to sleep on the sofa! Amazing how an ordinary walk can end with so much trauma and stress!!