The breed is said to be mischievous, but they are fun to have as they keep monkeying around the whole time. They have a curious nature about learning new things but are also quite stubborn, so to train them one needs to show them who is the boss because if they see you becoming weak they’ll become disobedient. Also if you have children in the house, then Affenpinscher can be a problem. Reason why? This breed is small in size so children can confuse them with toys, they do have tolerance for children but in order to defend themselves, they can be harmful.