// Instead of this:
angular.module('petStoreApp', [])
  .controller('petStoreOneCtrl', function($scope) {
    $scope.myCat = {
      name: 'Grumpy',
      type: 'cat'
    };
    $scope.myDog = {
      name: 'Lassie',
      type: 'dog'
    };
  })
  .controller('petStoreTwoCtrl', function($scope) {
    $scope.myOtherCat = {
      name: 'Fluffy',
      type: 'cat'
    };
  });
  
// Try this:
angular.module('petStoreApp', [])
  .value('petTypes', {
    CAT: 'cat',
    DOG: 'dog'
  })
  .controller('petStoreOneCtrl', function($scope, petTypes) {
    $scope.myCat = {
      name: 'Grumpy',
      type: petTypes.CAT
    };
    $scope.myDog = {
      name: 'Lassie',
      type: petTypes.DOG
    };
  })
  .controller('petStoreTwoCtrl', function($scope, petTypes) {
    $scope.myOtherCat = {
      name: 'Fluffy',
      type: petTypes.CAT
    };
  });