Research by a number of universities in South America shows that the gerbil has a penchant for alcohol. Tests run under rigorous laboratory conditions have shown this little rodent to be capable of matching human drinkers in respect of consumption. A little known feature of the common gerbil is the inflatory digestive system. This, coupled with the animal's ability to store liquids in its cheek pouches, gives it a maximum consumption of four litres of brandy.