I can see the pit, but keep in mind she may be mixed with more than just 2 things also. Could be Boxer, plus something plus something or even more down the line. I agree with Cami in that the only way to really know for sure is through DNA testing.
Tyson, white, 4 years, Boxer & Thor, 2 year old GSD
Tiger and Raven, kitties, 10 and 11 years
Erin flashy fawn, Lucas, Flashy Fawn, Boxer angels, RIP 11-29-10 and 8-22-07