different animals protect their young ones by diferent ways.Dogs have many ways to protect their puppies. Their first step is a preventative measure, which is digging a hole or trying to find a hiding spot to "nest." They will also protect their puppies by attacking other animals that they feel are threatening them or their puppies. That is why it is important for a dog to trust you if you plan to help them deliver puppies.
When strangers get too near the dog's puppies, It growls at you and stands in front of her puppies, letting them have a chance to escape.
There are many species of fish that do not protect their young at all. The ones that do protect their offspring usually keep the young together in a group and move them from place to place regularly. They will also drive away other fish from the vicinity of their young.