Hollow is a young male field mouse living in the woods. He enjoys exploring, but wishes he didn't have to explore alone.

1 day, Mother Nature had blessed him with a family of his own. But there was a catch. The litter of babies would be born from his stomach.

The babies inside his belly added nearly an extra 4 pounds. That's almost 12 times his body weight. His belly was swollen to twice its normal size. His stomach was as big & round as a jelly jar!