Pit Bulls are known for their strange behavior they attack on strangers sometimes.
Saint Bernard is very sensitive and hard to control this dog hard to train this dog breed.
Chow Chow is considered as worst puppies due to their unfriendly nature.
Treeing Walker Coonhounds are inexperienced and very harsh hard to train them.
Skye Terriers don’t like people or other animals unless they know them well.
Bullmastiffs require a lot of training and discipline because of theirs rude and misbehaving