12: BOXER
Although boxers are known to be family dogs, they have also apparently been involved in 48 unfavorable incidents where they have shown aggression. They do get along with other dogs, as long as they have been properly mingled with others from a young age. They do require an immense amount of attention so they are perfect for families looking to do lots of outdoor activities on a daily basis. They are even known to suffer from separation anxiety if left alone for too long.
