It’s a bit of a story. About four weeks after I adopted him, I took him to puppy basic training, where the instructor told me he was part Pit. I didn’t do anything about it then and didn’t return him because he’d won me over. Then, a couple of years ago, I was dropping him off at the vet’s and ran into a full blooded AST that looked almost like my dog, especially from in front. That got me going, so I had the vet run a DNA test on him, hence the exact breed structure.
Bah. Don’t believe those DNA things.
When they declare German Shepherds to be Molossars, like Bullmastiffs and the like, it’s complete full of it. Clearly Shepherds are not built at all like Mastiffs and Rotties and Bernards.
You can only guess, and all of us are fallible especially when it comes to mixes.