I will agree that she looks like a liver chestnut. And I too am sorry for your loss.
As for the question about the heart horse thing... That subject, for me, is sort of iffy. I think the answer differs for everyone.
I think your heart horse is the horse that you just click with. They're like a really close best friend. You know their faults, strong points, and weaknesses, and yet you love them for exactly who they are. You trust eacother, and there is just something there that you can't explain. You can't see it, but you can feel it. And it's strong. Sometimes it's hard, and sometimes it's easy, but you never give up on your heart horse. Because your heart horse never gives up on you.
That sounded extremely cliche. I should say that in "See what's cooking... At stoufers..." Voice, and see how much money I can get off of it. Bwahahahahahahahaa
Sorry, but in all seriousness, that's what I believe. The definition varries for everyone.
"I was eight years old, and I've never forgotten her face when she told me about watching you ride. She told me she saw you, and your horse was dancing in the moonlight."
-- A.C. Crispin's "Sylvester"