I recently bought 3 female mice ( for the cats' viewing entertainment ) from a pet store and one of them turned out to be pregnant.

She gave birth to 6 babies 3 weeks ago. One day last week I came across Pesca playing with a baby mousie, the poor little thing was half dead!

She then proceeded to devour it, right in front of me!

I went to check on the cage and the door was shut tightly and there were no spaces at all that the mousie could have wriggled through. The only way I can think of is that maybe Pesca grabbed it through the bars.

Pesca is quite the mouser!