If we let Mattie's fur grow all the way out, she'd look like this:
She had much more black fur than the gray "merle". She had a large patch of white fur on her chest in the shape of a heart and white paws. She had the standard Aussie pink with black splotches skin inside her mouth and her paw pads were pink and black. I always thought it was interesting that if an individual paw pad was pink, she had a white nail on it and if it was black, she had a black nail. She was born with the Aussie short tail -- it wasn't cut
The coloring variations are interesting. Maya has an enormous white bib that extends all the way down her chest to the undercoat. The bib extends across her shoulders, but on one side only. Most of the fur on her legs is white and she also has the black splotches inside her mouth and paws -- all of her nails are white. And if I were to guess, I'd also say she has the Aussie short tail, but I have no way of knowing if it had been cut. There certainly isn't any kind of stump, though her butt wiggles big time when she's excited as if she did have a tail.
I'm still trying to figure out what coloring she has besides the white, the copper, and the black. It looks sort of a cross between a gray and a tan, with splotches of black (the black comes out more in the winter). It's definitely not bluish like in this pic.
Another thing that Maya does when she's excited is to pant -- not because of temperature or exercising. Did Mattie do that as well?