Cow and Chicken (1997)

S02E23 Journey to the Center of Cow

Chicken celebrates his 11th birthday and gets permission to use the food catapult. Excited, he launches pork butts to Cow, but when his sleeve snags in the mechanism, he finds himself swallowed whole. In a panic, Mom and Dad rush Cow to The Red Guy, who attempts to rescue Chicken from the depths of Cow's enormous belly.