SmartDark and Handsome. I’ve used it and it works. (The omega-3s will bring on the shine as well)
(I used it on my red bay and while it kept the mane dark, I didn’t like the darker red/brown of her coat. Kept my seal bay on it though.)
Alois Podhajsky: “When I hear somebody talk about a horse being stupid, I figure it’s a sure sign that animal has outfoxed them. ...