So, for the past two months I thought Kitty was a dark bay. It was difficult to see that she was even bay at all considering how dark she was, but after a little while, she started to bleach out in the barrel. Her mane and tail seem black, however, after recently receiving a copy of her papers, it turns out she's registered as brown. Is there any way to tell? I looked at her mane and tail and I still think it looks black. I've seen horses registered as "bay" that have had browner tails. Is there a possibility that she's just darkened over time?