First batch of eaten babies

[TacoTheFaco]

I had two mice give birth on the same day, at least 17 babies total (I didn't touch them so some could have been hiding). In the course of 4-5 days, there were 10 babies left. They seemed to have stopped culling them off, but when I checked again a day or so later there were more body parts and blood everywhere. The remaining 7 were put in with an ASF colony, and are thriving. I'm hoping it was a first time mother thing, because I paid $5 each for two pregnant mice!

There were 1.5 mice living in a 20g long tank, with wheels, and a nest box.