Can a big dog and a small dog get along?

yes a big dog and a small dog can get along, at first they might be scared of each other or not used to another dog around, but eventually they will get used to another and get along just fine. It helps when you get both the small dog and big dog when there are little puppies so they will grow up with each other kind of as the same size but one will just keep growing, but the smaller dog will already know hat dog and trust him/her. But you can get them when they are both adults too, they just might not adjust as fast.