New boa, feeding question

[andyroof1979]

So, I just got this girl in a straight up trade for a bearded dragon. (And his very cool hide i made him). and yes, he is quite the dragon to be worthy of the trade, i still definitely got the better end though....

Now then, she was eating a ft jumbo rat every 2 weeks, i would like to switch to bunnies being as my retic will be that size in about 6-8 months most likley.

What is the best way to go about this and i have seen an argument on fb over this subject. I am sure a 3 lb rabbit every 3 weeks would be fine. Am i wrong?

She did not take the one i offered her, i assume she is still settling in as i got her 4 days ago.