(Previously posted on November 8, 2008 on the Blackberry Lane Studio Blog.)

In the comments on this post, I mentioned getting updated pictures of Prince, the palomino with all the Bend Or spots. I thought that he was more heavily spotted than last year, and after comparing earlier pictures I believe he is. These aren’t the best pictures since I didn’t have time to take him out of his shady pasture. He’s also a bit of a love sponge, so getting far enough away from him to get his whole body is always a trick. (I have almost as many fuzzy close-ups of his nose as I do of Sprinkles.)

In those comments, Sarah mentioned that the Bend Or spot on her Arabian, Dar, had the same three-dimensional quality that Sprinkle’s appaloosa spots have. I had a theory that perhaps the black hair grew at a different rate. But Prince’s spots seem to disprove this idea because they are flush with the rest of his coat. Here are some close-ups.

a spot on his shoulder

a large spot on his right hip

another large one, this time inside his thigh

So perhaps it isn’t about the color of the hair, but rather the density of the pigment. Appaloosa spots are densely pigmented. This is particularly obvious when an appaloosa has self-colored spots on a dark background. Many Bend Or spots have that same appearance, and those might appear three-dimensional in the winter. Prince’s spots are, however, clusters of black hairs mixed in with his normal color. Some of the spots have a higher percentage of black hairs than others, but they are all something a of a mix. If I had to guess, I would think that Prince was genetically a sooty palomino but that something was directing the black hairs to form spots rather than more usual patterns (dappling or all-over dispersion).

Rebecca Turner sent me some pictures of another odd expression of sooty palomino, and I’ll see if I can’t get permission to post those, too. He was another really unusual horse!

[Update:  The  pattern of spots on Prince remained pretty stable from the time these pictures were taken.  Sadly, he passed away earlier this year from colic.]