Лёгкие , нужен разбор предложения, каждого слова: Orthodontic appliances and splints to help straighten and protect patient.

Almost everyone has Pets. Kittens, Cherepashka, puppies. All we love them and they us too.

The most loyal Pets-dogs. They can be taught to stand on their hind legs, to force to flee to the owner. Dogs were the first to fly in space. The whole country will never forget the two heroes Squirrel and the Arrow. 

Neither one pet the owner does not rejoice as I rejoice dogs. 

Also, these four-legged Pets can save millions of lives. After all, people learned dogs come to the rescue. They are helping to find criminals, put out fires, to treat people. 

That's how dogs are. Here it is friends!