Looks like someone was breeding for color rather than type. She isnt a stellar representation, but yea the color is unusual and greys do sell so that's why....
Is Estrella supposed to be a registered name? If so, I can look it up and see if she is registered, if you would like.
She does look like she could use a few pounds and a bath.
She's actually at a pretty healthy weight she just like to stand funny for pics and makes her look unhealthy, she just needs muscle tone. And in the first pic is just after a bath, she just won't let us near her hind legs yet and it was also just a quick bath