Here's a question to further enliven the indoors vs. outdoors pet controversy; I'll say upfront I don't have one simple answer.
So -- what about dogs that spend nine hours or more, five days a week, alone in a "crate" while their owners (or masters, or human companions or whatever we call them) are at work, or hours more crated on the weekend when their "humans" are out with friends, going to church, shopping, etc.? Is being in a few-square-feet wire cage preferable to an outside kennel with a doghouse, room to poop, etc.?
I would guess that dogs, like humans, have a whole range of feelings about such situations -- some folks love big-city apartment life with other people swarming around, others would go nuts quite quickly if they didn't have open country space in which to move freely in fresh air with a degree of privacy. I won't pretend to think like a dog and so won't pretend to have the answer. But it does seem like a topic worth considering when folks on one side argue that keeping a dog in an outdoors kennel is akin to locking an innocent human prisoner in a cell, while folks on the other side might consider it even more cell-like to leave a dog locked alone in a small inside cage for 40 or more hours a week.
(Hey, don't flame me for raising the crate vs. kennel question

. I'm just curious to hear your views.)