A dog can smell our scent or hear you call their name. Dogs are very easy to train. You can teach your dog many tricks. Yes, they can save people from drowning. They are very good swimmers.
Newfoundland dogs are also good eye seeing dogs.
They can see or hear someone drowning. This dog is an example of what we call working dogs. Give your dog a place to sleep. Give it food and clean water. A dog will be your best friend if you take care of it.