My girl is an awful feeder but,,,,,,,,,,
I started her on rats right away. She was very small at about 1 year when I got her.
Believe it or not, at 3 years old she will take 1 pound rabbits. WHEN she eats. She's had a craxk at about everything, chicks, quail, F/Td rats, live rats and F/Td rabbits.
She is a bout 6' 4" now and I'm hoping after this rabbit she'll start notching up again.
I used to piggyback another prey item behind the first when she was being difficult. If she would only take a tiny chick, I'd ease a rat into her mouth as she was swallowing the chick.
You can do that with a rat behind a mouse if needed.
Lots of tricks, but I still have a picky eater.
She grows regardless of whether she eats lately.
Your snake looks fantastic!