What are her temps and setup like? Stress and/or illness will make any snake not eat. I have bloods and short-tails and the only time they don't eat is when they are in shed. If one of them skipped and wasn't nearing a shed cycle, I would be concerned. They eat every time like clockwork. Maybe they aren't all like that , but I would say that something is definitely off about her husbandry or the health of the snake if hasn't eaten in 5 months. There are plenty of quality animals out there, I wouldn't mess with this one unless you are up for a rescue mission.