Slow Growth Frogs and other amphibians are coldblooded animals that grow slowly, not a particularly desirable trait for farming. The rate of growth of the bullfrog tadpole varies with the climate, length of the growing season, and available food supply. Even in temperate climates, it may take a year or more to transform the tadpole into a young bullfrog. Another year or more is required to produce a mature, marketable-size bullfrog. Therefore