My 3.5 year old girl is up to just over 4 months now with not wanting food. She did just shed yesterday though which is weird and she dropped a urate. I offered her a small rat today as it was feeding day anyways for my baby boas and like clockwork, she didnt want it lol. My sunglow was extra happy as she was sitting at the front of the cage waiting for that door to slide open like she knew the BP wasnt going to eat it haha.

I wouldnt worry too much as long as your husbandry is good. BPs are not the snakes for people who worry easy haha. They can drive you insane. Get a boa or retic. Mine never refuse food and actually want to eat more than they should which i guess is a worry in itself too