BP stopped feeding

I have a 3 years old BP that until a few weeks ago was feeding just fine once every 1-2 weeks. For the past 3 weeks she's been refusing her usual frozen rat, but she seems interested, she smells it, assume the strike position, but nothing happen...
I have no clue in why she's acting like that...

A couple of months ago we upgraded her tank to a bigger, better one, got new lamps, new everything other than her hiding cave, and she ate in the new tank a few times..

She looks fat and alert, displaying her usual behavior...

Anyone has any suggestions?

Thanks:)

How big is her new tank? It's either the tank is too bog for her or she's just being a ball python and goes off feed on breeding season. Try giving her a smaller size rat and put her hide back.

I'm thinking it's the tank change. It could be too big or have too much open space. You could add some fake plants to the set up to fill in the space. She's old enough she can handle going for awhile without eating as long as she's not thin.