First off...if this is a pet, then you should consider not breeding her. Pregnancy and giving birth is a risk to the female's life. Some die from it, just as some males are killed by the female. If you do not want to risk losing her, don't breed her.

I would not feed any animal more than once a week, every 10 days is better. Every 2 weeks for BCC...they do better grown slowly.

As far as fast growing, Columbians can be, though they can reach 10 feet, 8 feet is average. Growth depends on diet too. A boa fed rabbits as an adult seem to get much heavier...though it could be through fat gain.

BCC tend to reach 10-14 feet, but they should not be grown out quickly, as that is a health risk to them. Their care is a bit more complicated than a Columbian too.

Weightwise, I know Argentines get heavy, they are a heavy bodied animal, but I think they only get about 8 feet? Could be wrong on that.

I think BCL get larger, but I don't know about their feeding habits...
hopefully someone else will have more info for you.
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Delusions of Grandeur feed the EGO...

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