I have one checky boy rat called Cola. He is very competitive to his brother, Pepsi. Sometimes the two fight over food and whos the boss. The boss is usely Cola as he pings Pepsi to the ground. As you come in the room where Cola is usely snuggled up to his pal, Pepsi he jumps up and clings his paws to the cage door and shows his belly! Cola loves cuddling down and having a rest, though thats a bit different for his brother!