User can only chose amongst appropriate facilities for a given animal

[askingalot]

Given a user has launched the program
When the user selects the option to purchase an animal
Then the user should be presented with a list of animals to purchase

Given user is viewing a list of animals
When the user selects an animal
Then the user should be presented with a list of facilities that are appropriate for that animal

Given user is viewing the list of appropriate potential animal facilities
When the user selects a facility
Then the user should be taken back to the main menu