Anyone wanna guess what my mystery mutt is?? About 52 pounds, 23" tall, high prey drive (sh

Anyone wanna guess what my mystery mutt is?? About 52 pounds, 23" tall, high prey drive (she goes bonkers if she sees a bird even move). Low energy but nervous around strangers and new environments or sounds. Got her from the shelter labeled as a lab mix and was told she’s a year old.