Tiff...the only way to truly tell with a white is to breed her and see if she gives a black or TOV later on. The white gene has an amazing ability to mask the colors it's mixed with. She doesn't look like she has TOV at all. I don't see a defined mask or veiling...paw stripes won't tell you anything either. I'd just call her a possible TOV until she breeds and proves it true or not.