Most animals have tails - people and apes don't. A tail is just an extension of the animal's backbone. Animals use their tails to communicate - dogs wag their tails when they are happy, cats wave their tails when they are angry and put their tails straight up to say "hello".
Animals like cows and horses use their tails to swat flies away. The kangaroo has a big, heavy tail that it uses to balance itself when it hops.
A person from Denmark is called a Dane.
Dane is also a male name.
You might also be looking for the great Dane dog.
A pet is an animal that is kept entirely for fun or as a friend. Pets are usually small animals, like cats, parrots or dogs. Animals are often kept for other reasons, like for their meat, their wool or to help herd other animals around. For example, cows are generally kept on farms for their milk, not as pets.
