I have 14 all together, i offer them all food the same time every week(5-7days babies, 7-10days sub adults/adults) if they eat they eat, as of right now all my 08's and 07's are eating might miss a feed or two but they are right back at it the next time, my big female(2000grams) hasnt eaten since the end of November but she just ovulated my other big female hasnt eaten since mid december but she is also breeding, and my two proven males have eaten maybe once or twice since december,

"remember, if you have selected a healthy ball python, it will be able to fast for several months without any ill effects. Reports of ball pythons fasting for up to a year before they begin feeding are fairly common. There are even two records of ball pythons that fasted for 22 months before feeding, so don't panic."

its not an issue if they arn't eating its only an issue if they arn't eating and they are losing weight, if your snakes are losing weight then i would worry about it

**the paragraph with the quotations was from The Ball Python Manual**

now if you really do want to switch ur snakes from mice to rats a good way to do it is to throw a rat in with a few live mice the rat will pick up a little bit of the mice's smell and your snake should be tricked! lol, i have heard people doin this when tryin to switch their snakes from mice to rats and vice versa, but like a few people mention in this thread your snakes are fine with mice. Your snakes can eat food that is as thick as the thickest part of their body, but alot of breeders including myself beleive that smaller prey more often is better than huge meals further apart

hopew this help!! good luck!!