Horse Veterinary Questions? Ask an Equine Vet.
Good Afternoon and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
It is not unusual for horses at this age to lose weight mostly because their digestive system is not as capable of taking in all of the nutrients that Rocket is taking in. There does not need to be a metabolic problem for this although, it is best to have your vet run lab work to rule out a metabolic problem such as a thyroid problem or other issues. Cancer of the intestinal tract is also on the differential list but without diagnostics, you will not know for sure. The best you can do for Rocket is what you are doing...increasing his feed with high fiber with beet pulp and feeding him separately and then free feeding hay.
Check Rockets teeth when you have your vet run lab work...painful points can cause weight loss due to Rocket not chewing as well and getting all the nutrients that he is ingesting.
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, ***** *****