Well you're not going to believe it, I have three female ball pythons that have been fasting for about six months. I haven't been able to get them to eat fresh killed rats or mice and I've been trying every week. So I popped in a medium rat into all three tubs then went out and fed the dogs and came back in. All three ate their rats! They are all about 1200 grams, I'm thinking I may be able to get quite a few rats into them all and try to breed them in a couple months! Thanks for the advice!