I wouldn't worry too much. BP are known to go off feed for extended periods of time. Reptiles and snake especially are very hardy creatures. I've heard of adult BP not eating for 6+ months and not loose an ounce of weight. Remember the bigger they are the less they'll move and less energy consumed means not having to eat as often. Even more so I you feed it larger prey like rats. You could also talk to a local vet. I've also heard if you expose the brain of its prey or soak the mouse in chicken broth it might coax it to feed.