I recently took in a 13-15 year old paint mare, and has really bad rain rot as well as dropped weight very fast this past winter. She also is not shedding like she should be. Where I live the temp has reached 80's and 90's. I have been brushing her twice a day and she just isn't shedding very much. Any recommendations to help her gain weight? I've also ordered Mane Tail & Groom to treat her rain rot, would it be smart to get her a full body shave as well? Any help is greatly appreciated.