Q. My veterinarian recently started injecting my 24-year-old Appendix Quarter Horse’s joints. When injecting multiple joints (for example, both the left and right hock), is it unusual for one joint to show more improvement than the other? My horse has similar deterioration in both joints, but after injections he is now showing uneven movement.

Kim, via e-mail

A. It’s fairly common for one joint to be more affected than another even if they show similar deterioration on diagnostic imaging. If your horse is not responding to the joint injections as well as you expect, it is a good idea to have your veterinarian look at the horse to see if there is any other source of the lameness.

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