Bullfrogs are gluttonous by nature and eat a lot during the growing season. When feeding with bait plates, groups compete for the plates, and the weak ones are often squeezed out of the plates. The maximum stomach capacity of bullfrog can reach 10 times of empty stomach capacity.

Bullfrogs are ferocious in nature. It often happens that big frogs eat small frogs and can swallow snakes. Bullfrogs can eat and starve. When food is extremely scarce, the metabolism level of bullfrog will naturally decrease.