we had a pet rat once (it was a small size).. my 4 year old daughter named her Jelly. She was carrying her around that house and my daughter had to go potty. so she sets the rat down goes potty and "WHERE DID JELLY GO" at the top of her lungs...... we had a rat lost in the house for 3 days. My girlfriend found her at 3am while we were laying in bed and Jelly BIT her finger. Jelly was going to be food but i kept forgetting to feed her off. Jelly had her second litter yesterday and is now a great breeder.