Add a Pet to an Application

[BrianZanti]

As a visitor
When I visit an application's show page
And I search for a Pet by name
And I see the names Pets that match my search
Then next to each Pet's name I see a button to "Adopt this Pet"
When I click one of these buttons
Then I am taken back to the application show page
And I see the Pet I want to adopt listed on this application