Of course, to make it a fair competition, the more diminutive contestant was provided with hot dogs more fitting of his smaller frame. But as YouTube channel HelloDenizen notes, they weren't really hot dogs at all:
"They were made out of grapes, dates, or carrots. The hamster ate whatever seemed to taste best to him!"
And it's a good thing; entire hot dogs wouldn't be considered a "safe" food to feed a hamster.