I also feed most of the young animals once every 2 weeks, they do realy great with it. When a boa is fed less often the animal is more in movement, more movement is more muscles, more muscles is healthier and gives bigger breeding records.

Young boas can be fed every week, nothing wrong with it, even when you feed adults every week they definatly not going to die from it. My advice to feed boas is just feed them every week or 2 weeks when they are young, when feeding every week you need to skip feeding once in a while (for there movement.), the snake does not depend on that specific prey.. Even in the wild there isn't a monkey around witch gives your boa a rat every week or every 2 weeks. I have expirienced that my boa witch is fed every 2 weeks since birth is way stronger and even so big as my boas fed every week. But my boas witch where fedded every week are less stronger and have more fat, and beleive it or not... Both animals have the same body mass...

Everyone chooses for a schedual witch works the best for them, i choosed mine as above, somebody else does it otherwise and has also healthy pets as boas. You just have to trie and expirience yourself... And remember eatch boa is different !!

PS (edit
If you check my animals on my site, the arabesque female (my largest yearling.) is fed every 2 weeks, my intergrade are fed every week.. The lipstick line animals are to thin, but they aren't that long in my collection yet. So do not think i underfeed, they do really great