Where are you getting the color information from on your filly's parents? Perhaps the mare was a solid when reg'd(appys can change color as they age) and no one ever had it changed. Also, if the breeder told you the mare was solid, perhaps she meant solid, as in not a leopard, and not a blanketed or spotted appy, but was a solid appy?(characteristics etc.) You really need to see if you can find more details outabout the parents...about what they look like NOW, and not when they were younger. Do you have pics of her parents?