Yeah, we rescued ours from Petco, someone dropped it off. Petco had it for 9 months and it didn't eat once, and they force fed it mice twice. They never even tried rats and she LOVES them, even f/t! I pre-scented some f/t mice with my pet rats bedding, and she will now even eat mice if they don't smell like rats! Ours has also had to gain weight and turn into a normal boa and is a lot bigger than yours haha, maybe..about 3 feet? But she is over 2 years old, so I think she was stunted also.
Yours is healthy looking and I'm sure with some more TLC will look great!