If you’re reading this, we know that you completely adore Rottweilers. There are many reasons to love Rotties: they’re loyal, intelligent, and affectionate. Furthermore, living with a pooch is an entirely different experience, especially when it’s a Rottweiler we are talking about. However, in all this fun, there will be times when you will face your Rottweiler growling and rumbling at you. In that case, you may want to know, “why do Rottweilers growl when happy?” or what are the reasons why a Rottie rumbles?