Has there been a saint bernard and chihuahua mix?

A Saint Bernard and Chihuahua mix is possible, although it would be a very unusual cross. Saint Bernards are a giant breed, while Chihuahuas are a toy breed. This would result in a large difference in size between the parents, which could make breeding difficult. Additionally, the personality and temperament of these two breeds are very different, so it is hard to predict what the personality of a Saint Bernard and Chihuahua mix would be like.