Wow! This hamster is so big and fat. He should do some jogging to get in shape. Become his coach, and tell him to run through the city, and jump over obstacles. Active lifestyle, that is the only way to lose some weight. Jogging in the city in full traffic is actually more fun than it seemed to be. Avoiding cars, and jumping over all sorts of obstacles is super fun, and even fat hamster loves it. If it goes this way for few weeks, we will have great athlete here. Have fun.