I own a 7 year old palomino mare who's tail is always a mess. She never picks her tail high enough when she goes, so she gets chunky grossness in it. It gets even worse when she comes in season. Her tail is pretty much stained black. Over the summer we wash and condition it about once a week, which helps but doesn't get out the stains. We've tried blueing without much success. Have any of you found anything that gets the black out of light colored tails?
Here's a picture (on a fairly good day)