The bleach spot on the hip of this horse is the type of marking that often raises questions about whether the individual is a chimera. It...

Double-dilute foals sometimes display irregular patches of darker coloring.

If not all brindle horses are chimeras, what are they? When unusual horses are posted on social media, a typical response is for someone...

I have been thinking a lot about the size and spacing of spotting patterns lately. It's something I notice in appaloosa patterns and also...