My Tennessee Walker has a really short and ratty mane. We moved him from a bad barn a while ago and he had HORRIBLE worms. They're all gone now and have been gone for a while, but his mane still remains fizzy and broken. Any products that would help? I already use MTG for the mane growth once a week and I use mane and tail conditioner when I see him. Are their any supplements I can give him that would help?