I'm reading more and more into her..
This is what her owner has to say...
"This filly is mine and I asked two experts about chimera....No chimera. They told me that their opinion is that my horse is genetically speaking a normal Appaloosa that, during development in the womb, ended up experiencing a series of random events during a critical stage in melanocyte development and migration that resulted in her having large areas of normal pigmentation, instead of being a leopard, which is what she appears to have been genetically programmed to be. Since this is a developmental error, and not something caused by a mutation, she should reproduce normally, and have foals that have more conventional Appaloosa-looking patterning. Yes, she will have normal foals...but that's what I thought when she was born :o) As far as a color change...she has not changed color at all and she is a yearling now."
She is still so interesting.