My Chile rose, goes through times of not feeding, last time she didnt eat was for a month or so, like nicky said they are notorious for fasting, Why? I dont know? summat they do I suppose. They will usually stop feeding pre-moult, which you can usually tell by the bold patch on the abdomen. I dont think its anything to worry about though. Just one other thing, 2.5 inches for a 3year old Chile rose seems a bit small to me.