The Newfoundland are particularly large dogs with shiny fur that are considered excellent swimmers and lifeguards. They can carry up to twelve people to the mainland. One of these cans can be worth about $1500, and usually has a life of 9 to 10 years. Known as the gentle giants, these dogs require regular grooming, which costs approximately $65. At the same time, you should be prepared to potentially face $5500 in health costs for your most common medical conditions such as cardiomyopathy.