We are considering getting a second cavalier puppy as a companion for our 13 month old cavalier Sally. We met a local breeder at crufts who has recently mated two of her dogs and is waiting to see if the bitch has taken which she should know at the end of the month. It will likely be the very beginning of August before these pups are ready for their new home if it is to be. My concern is how easy is it to house train a second dog? I'm worried that Sally might go backwards if she witnesses the puppy having an accident in the house and that Sally might think its ok for her to do it . Sally is fully house trained now. What are other members experiences of getting a second dog as a puppy?