9 yr old ewe her back legs support could it be arthritis?

It could be arthritis. Arthritis is a common problem in older sheep, and it can cause pain, stiffness, and lameness. However, there are other conditions that can also cause these symptoms, so it's important to have your ewe examined by a veterinarian to get a proper diagnosis.

Here are some other possible causes of lameness in sheep:

* Foot problems: Hoof injuries, abscesses, and overgrown hooves can all cause lameness.

* Leg injuries: Fractures, sprains, and strains can all cause lameness.

* Joint problems: In addition to arthritis, other joint problems that can cause lameness include bursitis and tendonitis.

* Muscle problems: Muscle injuries, such as strains and tears, can also cause lameness.

* Neurological problems: Some neurological conditions, such as spinal cord injuries and nerve damage, can also cause lameness.

If your ewe is lame, it's important to have her examined by a veterinarian as soon as possible. The veterinarian will be able to determine the cause of the lameness and recommend the best course of treatment.