Split one index.html page into one template page ( index.html ) and 3 other pages which contains directly needed information :
 1. main page ( main.html )
 2. list of pets ( pet-list.html )
 3. detail information about specific pet from list of pets (pet-detail.html) .

 This 3 pages inserts into template page in runtime with help of AngularJS ( module angular-route.js ) .
 Navigation rules contains in app.js.
 Data retrieves in controllers.js through web services on server side.