Horse Veterinary Questions? Ask an Equine Vet.
Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
The possibilities for this condition that is affecting Rob is as follows:
Trauma from an earlier period could cause heavy fibrous scar tissue to deposit in this area. If this is the case, hosing and ice packs will help resolve this but not all of it. the fibrous tissue will remain causing Rob some problems in mobility.
There have been reports of muscles hardening due to a tumor underneath this muscle causing this muscle to stretch and form scar tissue and fibrous material. The only way to know this is an Ultrasound which will tell you what is happening in this leg or the other leg. You did not say if any diagnostics were done but a muscle biopsy would give you more information along with an Ultrasound and possibly, an xray.
Bot***** *****ne is that further diagnostics needs to be done so you can find the cause for this condition in your sweet Rob.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.Sincerely, ***** *****