The penguins are trained to one at a time step into the box where they can be weighed. Then the aquarist will feed the penguin fish, counting each one they eat. Then both weight and number of fish ate, are recorded and used to see if penugins are ill, ready to molt, or are reayd to breed. They do this evey day to each penguin. With over 80 penguins, it may take a while!
