Dogs. They are our companions, domesticated by humanity over thousands of years. Dogs come in a variety of colours, shapes and sizes. They have the largest variation in size, from very small dogs (Chihuahuas) to massive dogs (Great Danes). Dogs have been beside humanity for a very long time and will continue to be beside humanity into the future. Dogs are pets, friends, workers and much more to people.
For more information about dogs, visit https://www.thoughtco.com/how-and-why-dogs-were-domesticated-170656 or check out The Complete Dog Breed Book.
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