I've a 3 year old, and the only time he's missed a meal (other than being in shed) was this part January, and even then he only went for 3 weeks. If memory serves me, Dumeril's tend to have a slower metabolism than other boas, so every other week is fine.
For reference/btw:
Ivan's in a 36*18*18 slide-top glass terrarium, with the ambient temp staying at around 86, and a warm side that's pushing 90. at night it drops to 82, with the hot spot going to 86-88. Humidity stays between 55-65%. Wish I had a digital to show him off with - his pink is dern near red, and he's got a lot of orange, and a slate blue head, all of which has only gotten more intense with age; he truely is stunning!!
hope this helps
Kim & crew - particularly Ivan in this case
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the crew:
1.0 Dumeril's boa (Ivan)
0.0.1 Ball Python, hypo (Nikkomis)
1.0 viper boa (named him Dante)
1 Shar-pei (Sable)
1 wookie(half old english, half giant schnauzer: Gus)
1 cat goddess (Graycee)
too many "breed-my-feeders" mice/rats
1 dumbo rat (Boopsy)
1 very understanding husband, who only claims the dogs