My dog did not go out of the yard and is now limping lame on one of his hind legs
Anterior cruciate ligament rupture in dogs
Often time vets are confronted with this situation in veterinary clinics. As far as the owner knows their dog would not have been subject to any trauma, yet they can hardly take weight on one of their back legs. There are many possible causes but by far one of the most common reasons for this situation occurring is a tear of the major small ligament inside the knee.
Lameness in old dogs

Lameness
As a dog gets older, he or she may start to struggle to get up or get a little slower on walks. You may notice that they are worse in winter than in summer or after resting for a prolonged period. Sometimes they may not to be able to place any weight on a leg at all and this may happen quite suddenly. Lameness in older dogs can be broadly placed in three categories:
Lameness in young dogs

Lameness
Getting home to find your puppy or young dog not placing weight on a leg is always a concern. There are many different reasons why a young dog may limp, some more serious than others. Causes of lameness can be broadly placed into three different categories:




