My female 08 pastel ball python who is about 480g has not eaten in almost a month. She has not lost much weight if any. But I recently switched her to rat pups from adult mice, and she seems really afraid of the rats even though they are barely bigger. should i switch back to mice? she ate the first rat i offered her but not with a good feeding response. before this she was a pretty good feeder, she would rarely ever miss a meal, but would sometimes have a less enthusiastic feeding response. she has pooped since her last meal. how long should i wait before i see a vet?