I changed my rodent supplier about a month ago. I noticed within about 3-4 weeks most of them wasnt eating as well. I had discussed it with someone and told me that it could be the new supplier. Well needless to say I changed suppliers again. I waited 2 weeks and tried feeding from the new supplier. Guess what they all ate. Even the new babies I had had gotten that had only been on f/t. Great knowing you can figure these things out. Hope this helped someone out there.