Originally Posted by NdAppy
You don't have to have brown in the mane or tail to have a brown horse. Nor do you have to have brown in the mane or tail to have a bay horse. Brown is another form of agouti, which is the same gene as bay. They restrict black to the points.
I am not a color guru, nor am I a genetic one. However, I would not expect brown in the mane and/ot tail of a bay, no less have to have it to be bay. Only reason I said anything about the mane is that from my own experience, that sunbleaches and tends to stay visible, since it is allowed to grow longer. Regular coat sheds out, as we know.
I think that after the OP's horse has shed out, and perhaps gets some sun.....then if there is ANY brown you will see it. Mine (pics above) actually gets relatively light brown with dapples where his saddle sits in the summer if he is out 24/7. I still think the OP's horse is black.