After adding 5 normal females to my collection this weekend, I had to feed today. Monday is normally feeding day here and happily 3 of the new girls ate too. I figured out that I am now going through 23 mice a week and 4 of the balls didn't eat today. So it looks like I will be going through possibly 30 a week now. I am going to switch the bigger balls over to young rats soon. How many mice/rats do you go through on your feeding days?