I think it’s cool you are a huge animal lover, same here.
3 years ago my daughter volunteered at a animal shelter and wanted us to foster a dog that had been hit by a car and found in a field on deaths door. Both hips were broken and her hind legs looked like they were fused together. The shelter was going to put her down, but won over the staff the way she would constantly wag her tail. Both ball joints were replaced and after a few days we took her home. Because she had been starving and was in such bad shape, they didn’t know what kind of dog she was. After about 3 months we knew she was a pit mix, couldn’t believe it. We never wanted a pit, but went ahead and adopted her anyways.
I ordered one of those DNA kits online and it showed pit/lab. She is very submissive and has been the best dog.
Your daughter should try the DNA kit ($60), very reliable. Agree, the pup doesn’t look like there is any Rottweiler.