.. this is great advice, reduce feedings.. especially since you are not planning on breeding that pretty snake.
Too often keepers think in terms of 'how much can I feed my Boa"? instead of "how much does my Boa need to be fed"?. The difference is important.
I look at feeding schedules for Boa as minumum, average information for people who are still learning about their animals. Instead of deciding in advance to feed your Boa 'this much food', 'every so many days' watch the animal and see if it really needs more food to be healthy and grow at a modest rate.. Find reasons to skip meals, such as during shed-cycles, instead of planning for the next feeding.
You will find in practically every instance that your Boas will do very well on substantially less food than many would advocate.. even with breeding females.. Fat boas, even pregnant boas that are fat, are a captive phenomenon.. Photos of Boa that are ill, have died prematurely or produce problem litters often also show a fat boa. The data collected so far on Boa in captivity strongly suggests that keeping your boa less-plump will extend it's life and health.
Good luck!

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Gus
A. Rentfro
RioBravoReptiles.com
www.riobravoreptiles.com
"Quality is not an accident. Perfectly healthy animals are a minimum requirement.. everything else is just salesmanship" gus