I agree with jmcrook. You BI will be fine if you finish off the weaned rats and then go to small rats. Boas are very efficient and a little bit of food goes a long with them.
Could you feed small rats at this point, yes. Should you? Probably not. I'd wait until closer to 700G before switching to small rats. Once on small rats, I'd be feeding every two weeks, as you are now.
If you want to feed the weaned every 10 days now instead, that's an option, but not a necessity.
Good luck and keep us posted.
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