I noticed they say to get a 72" for a 14.2-15HH horse, and a 76" for an average size horse, then 80" for 16.2 . I have a little 14.2 (maybe) guy and a girl about 15 or 15.1. My best buy is going to be to get two 76" blankets. Would it be bad to put a 76" one on the 14.2 boy as well, or is too big a problem, like would it be too drafty? Or should I just get the 72 for him and the 76 for her? Thanks!