Yeah, I have some hatchlings that are 2 months old and are eating crawler rats. Still on fuzzies after this long is very concerning.
It's unsurprising that a ball being fed so minimally would fail to defecate for long periods. They also tend to hold off on pooping if they're about to shed, they like to save it all up at once---perhaps to minimize odors, as they stay in hiding until the shed is done, and the shed skin itself probably has a strong snake smell, so they can leave all the smell behind at once and help avoid predators.