Dogs have evolved over the years and have earned the title "man's best friend". Dogs have many uses, including being police dogs and can sniff out bombs and drugs (etc.). Also, dogs can only be there for a pet. Dogs have many life stages, many benefits to humans, and have evolved over thousands of years. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay Dogs have evolved over thousands of years, since they first appeared with humans over 30,000 years ago, and even now, dogs are constantly evolving. First of all, all dogs have the same ancestor, the gray wolf (PBS). All dogs from Newfoundland to Pug all have the same ancestor, the canis familiaris (Nat Geo). Some dogs were bred to look a certain way. An example could be the San Bernese; more than a hundred years ago the San Bernese was a dog bred to be used for working. In the 1850s people began breeding them for dog shows which included changing the shape of their skull. Scientists are still debating where the dog came from, some say from the Middle East and Europe and others say from East Asia. Few people know it, but the dog is the largest carnivore ever domesticated. There are also some negative things about evolution. This would mean that evolution has caused many health problems for dogs. There are many benefits to having a dog. For example, dogs can make humans healthier, happier, and keep them safe (American Humane). First of all, dogs can make owners happier. Dogs can make people happier because they are calming, familiar companions (American Humane). Dogs are natural conversation starters and this promotes social interaction (American Humane) and the more social interaction people have, the happier they can become. The next benefit of having a dog is that dogs can make owners healthier. Dog owners can simply become healthier by adapting their dog's lifestyle (American Humane). Dog owners are also 54% more likely to get the recommended exercise than people who don't own dogs (American Humane). Dogs can also keep people safe. Studies have shown that barking dogs help better deter burglaries and other violent attacks (American Humane). With a heightened sense of hearing and smell, dogs can detect things that people cannot and can alert people to possible danger (American Humane). Additionally, a dog's natural instinct is often to protect its home and family. Dogs, like humans, have many different life stages. Dogs go through four different life stages: puppy, adolescent, adult and senior (Pets). The puppy stage begins after approximately 63 days of gestation (Pets). During the puppy phase the dog learns the correct way to interact with humans and other pets that share his home (Pets). The next stage of life is adolescence. During this phase the hormones begin to act and, if not spayed/neutered, the dog may begin to behave like a moody teenager (Pets). Dogs will also shed their puppy fur and grow to their full size. The next stage is adultery. During this stage it occurs between 1 and 3 years. Furthermore, the dog will not be as demanding in terms of attention and will not exude the same energy he had as a puppy (Pets). The dog will still benefit from the exercise