Irish Wolfhound
This is the tallest of all breeds and was bred to hunt wolves. They have an aggressive nature and are driven by an instinct to hunt smaller prey. That’s not a trait you want in a pet around your children.
Spanish Water Dog
These dogs are very high maintenance and need plenty of exercise every day. Without proper training, they can be difficult to handle. Without stimulation, they can become a nuisance around the house and possibly react aggressively to show their frustration.