HI,
Better start reading some of them care sheets on feeding, another thing that can happen with overfeeding, is prolapsed rectum or vent when you over feed everything gets all streched out
and just falls out the back end. This is a fatal problem. After they eat they should only have a light bulge (slight)..
If your feeding to get a big snake just about every pet store has four or five boas over five feet that
are what I call pet store returns, They are just to big for their owners, poor little buggers all packed in one little cage...
I realize you have really good intensions but power feeding, or over feeding will reduce the life expectancy of a boa from a normal life of 20 year's down to five or less. They usally die of organ failure.
Be sure your tanks has a really warm side and the hides are on the cool and warm side. No part of the tank should be less tha 82-84 deg on the cool side.
Take care be careful with the ones you have remaining, put simple 3/5 card on each tank exterior and only feed every 10 to14 days. Never feed early, Keep clean water on the cooler side be sure to clean the dish .
Good luck Doug
Below is a short cut to an excellent care sheet for Boa's add it to you favorite list take the time to read it and your snakes will thank you.
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Aint them BOA'S COOL --
http://www.redtailboas.com/carelinks/carelinks.html