English Mastiff

Often the heaviest breed of all, with big males passing 90 kg, the Mastiff is also one of the calmest: it sleeps much of the day and guards mainly by being there. That mass brings drool on every surface, hip dysplasia, bloat risk and drug doses priced like a small adult's. Expect around 9 years, often less, and teach lead manners early, because a male puppy can pass 50 kg well before its first birthday.