First, it can be very common for them to have periods where they go off feed. Check your temperatures in the cage, and if your hot areas and cool areas are where they need to be, and the animal doesn’t have any ailments of any kind, it may be normal. Some go off during the breeding season and some go off during a natural brumation cycle, even though we are artificially controlling their environments. We hear this the most with ball pythons and bearded dragons. It is very common for both of these to have very long stretches of not feeding. It’s not unusual for them to refuse food for months at a time. As long as they stay hydrated and do not lose significant amounts of weight, it is nothing to worry about.