In order to find the best possible Saint Bernard mix, it’s important to consider what traits you are hoping to bring out in the mixed breed. For instance, if you want a calmer dog, then mixing with a breeds like the Labrador Retriever or even the Golden Retriever may be a good option. However, if you are looking for a more energetic and playful pup, then mixing with something like a Cocker Spaniel or Poodle may be better suited. Whichever route you decide to go, just remember that each individual dog is unique and will have their own personality - so make sure to do your research and choose a reputable breeder!