Human leave in conditioners on horse tails?

Is it safe to use a human leave in conditioner on a horses tail and mane? I want to keep his tail and mane braided but I know you should always keep a conditioner in it when you do that. So is a regular leave in conditioner okay or should I get a horse conditioner. Any other ideas to put in his main and tail? I can't do anything oily like MTG because its too oily for his skin and he looses hair.... YIKES!