The Zoo Keeper Application
 
The Zoo Keeper needs to keep track of all the animals in the Zoo. 
He or she needs to know what species of animals are in the zoo, 
what their names are, their gender, what and when they need to eat,
what habitats they live in (cage/yard/aquarium), and their 
general health and mood.
 
Currently in the Zoo there are gorillas, giraffes, penguins, and 
a small petting zoo with goats and lambs.
 
The Zoo Keeper also carries an iPhone that receives messages from 
the system to let him know when to perform a task. He also uses 
this device to record notes when he feeds or cares for an animal. 
This note might be the animal's mood or anything that might 
indicate the animal's good or bad health. And when submitted, is
stored in the system.