They need moderate exercise and can excel at dog sports like agility, drafting, herding, rally and tracking.
Originally bred to hunt wolves in Britain and Ireland, the Irish Wolfhound is not as ferocious as he sounds (or looks).
If you want a breed who may be puppylike and rambunctious well into adulthood, look no further than the Greater Swiss Mountain Dog.
It can take this gentle giant four or five years to reach maturity, which can be taxing for even the most patient dog owner.
The breed generally adores children, but since these dogs are so big, they can accidentally scare or harm kids.
The Newfoundland is often happiest when he’s in the water or snuggling on the couch with his family.
With his calm demeanor and docile temperament, the Newfie can be an excellent therapy dog — he’s just the right size for standing at a bedside, as he tends to be about 26 to 28 inches and ranges from 100 to 150 pounds.
The breed will often do anything to protect his family and tends to be suspicious of people he hasn’t met before.
Though he might not be the best choice for inexperienced or first-time dog owners, with firm and consistent training and plenty of socialization, he can be a brave, assertive, calm and patient pet.