Nubians are known for their loudness, generally in my experience they are only noisy when they want something or are unhappy about something. I've never had a mini nubian, but I have full sized and nigerian dwarfs. I love nubains, they were my first favorite goats, but I have to admit I love my nigis! Don't know that I'm helping much, you'd want to find a well established mini nubian breeder, in my opinion, because you'd want them to breed true.