One of my friends that shows Arabians told me how she got her horses coat dark and healthy.
They put black oil sunflower seeds in their feed!
Walmart.com: Pennington Black Oil Sunflower Seed, 20 lb: Garden Center
I believe she said put a cup in each feeding. I'd have to ask her to make sure.
My little colt's coat is absolutely pitiful. Just blah and always blah. Never looks all that healthy. I'm trying one supplement right now, and if it doesn't work I am going to start this and see how it goes:)
Anyone want to try?:)