I tried feeding him yogurt and peas. Fortunately, my husband works with miniatures, so we used some tiny tools to pry his mouth open and shove some yogurt in. The lady at the aquarium store said this would relieve his trapped air. I will force some peas in later if the bubble doesn't start to go down. However, he is still quite vital and gave some lively kick when I snatched him for his meal time.