Help with creating a new breed

[slick]

Why would this horse not be a pintabian?

http://www.horseworldonline.net/horse/profile/1811925

[Aela]

Why would this horse not be a pintabian?

http://www.horseworldonline.net/horse/profile/1811925

That's because she only fits one out of four evaluation points.

She's way too tall, too light and too horse-typey.

You need to combine parents that will create a foal that falls within the correct eval. I would suggest buying the pintabian eval book and finding two horses that fit the criteria better, then try and cross them :)