This flask contains a clear, always cold, liquid that smells strongly of cooked fish.  The potion is designed for animal consumption however, rather than human consumption.  When fed to an animal, typically a pet or guardian, the animal gains intelligence, 50% over base line.  This effect is temporary, but learned behavior is lasting:  any training of the animal so influenced will remain after the potion wears off.  The effect of a full potion lasts ten hours, but it can be given in smaller doses for a commensurate duration.

Should a human foolishly consume this potion, the reverse effect occurs; he or she will lose 50% of their intelligence for ten hours.