Looking very much like a crossbreed between a Newfoundland and a Golden Retriever, the Leonberger is yet another dog that can be very friendly yet very protective too. Thankfully, it’s smart and can take cues from its owner, learning how to treat other people it meets by watching its human carefully. Considering its large size, the Leonberger needs to get daily exercise, but doesn’t require lengthy runs around the block. Rather, its happy to get some excess energy out so it can go back inside the house and lay around with its human family the rest of the day.