Thank you for all the responses. The BO says it is just the feeder, but I feel that it is more than just that. I tried to have the vet look at it today but when someone from the barn mentioned that many horses are rubbing because of the feeders he sort of lost interest in that. Yes, I am getting a new vet.
He is on Safe Choice Senior feed because he had difficulties keeping weight on. He as been on Coco Soya and a vitamin and mineral supplement, but as i changed to the Senior feed I dropped those because he has gained weight and he is getting a complete feed. I did add Tri-Amino for muscle and Smartitch- Ease from SmartPak. He has gained weight, but muscle seems to be an issue, and the Tri-Amino was recommended to me. I added SmartItch-ease to help him not be do itchy.
Today, when the vet was out for fall shots, I asked him about some places that seem to be odd fatty deposits and he thought that maybe he had cushings. Tank is only 13 but seems to have several of signs. The vet said I should have him tested in the spring. I am rather uncomfortable waiting, but I guess it is harder to test for in the fall/ winter? I don’t know if that will play into why he is rubbing his mane or not.
Ugg Horses!