It's wrong to have two pets that don't get along.
James knew his dog didn't like other dogs, but then his friend offered him an adorable Labradoodle puppy.
James wants to spend time with the Labradoodle puppy.
James says that he can't take another dog, but offers to walk the puppy for his friend.
James adopts the Labradoodle puppy and brings it home to meet his old dog.
James regularly takes the puppy for long walks then goes home to his old dog.
The old dog keeps trying to bite the puppy and James has to lock her outside.