Not to offend anyone, but....
to me, at least, it seems like many people here are against having an outdoor dogs. At times I do agree that having an outdoor dog is not the best idea, but not always.
Just because a dog lives outdoors does not mean that it is not well taken care of, or that it is not happy. There are plenty of outdoor dogs are there that love their lives. Yes, there are also outdoor dogs that hate their lives. Most likely if I see an outdoor dog, whether chained or penned, I'll feel bad for it and see it as being bored. But unless I go there every day to check and see, I can't be sure the dog isn't allowed indoors at times, or doesn't get to spend times with his owners.
I know a Bernese Mountain Dog that lives in a pen, outdoors. From what I have seen, the dog is never let out of the pen. She seems well-fed, her pen is medium/large in size, she has a dog house, and some shade. So she's not living a horrible, disgusting life, but it's not the best, and I do feel bad for her (which is why each Saturday, when exercising a neighbor's dog, I give her treats and the two run up and down the fenceline playing with eachother, LOL).
But just because a dog live outdoors doesn't mean it's not well-taken care of and doesn't have a good life, and just because a dog lives INSIDE doesn't mean it's well-taken care of and has a good life.