This was my suggestion if and only if you do not have to braid that mane because it cuts the hair. I took four handfuls of mane off of my horse this spring and DID braid that in the fall when it was half grown out, and it took a lot of hair spray and a lot of trimming fuzzies. Other than that, this thing works like a charm, horses don’t mind it at all, and even better, you can get it for half the price if you call it a “pet thinning comb” and take the Solo brand name out of it. Find them at your nearest pet supply.
(When he turned 18 and semi-retired, I decided that mane pulling was one of the things that my horse didn’t like and thus didn’t have to deal with, and have gone at it with a scissors, clipper blade, or thinning comb ever since. I figure I braid him myself once a year and I’m the only person I’ll ever piss off. He looks pretty good with 55 braids in his neck, but I am a bad example to the barn kids.)