It can happen in puppies or adult dogs with compromised immune systems, but it usually occurs in dogs under the age of one year. (animals.howstuffworks.com)
What could be more exciting than welcoming a new puppy or adult dog into your home? (chastainvets.com)
Bringing an older puppy or adult dog home to live with your family isn't something to do on a whim. (mnvet.com)