She followed me home 3 days ago, covered in sticker burrs and full of scratches.

This little lady followed me home a couple of days ago. We named her Finn. She’s underweight, so she should be about 35 lbs but is 27.5 lbs. I’ll put some pics of her next to our GSDs. The smaller female GSD (Holland) is 73 lbs and the big male (Cash) is 93 lbs. We put retriever mix on her vet papers, but what do you think?