All three of our boys are allowed inside. Infact, they are inside a bit too much at times! I will always have my dogs inside, and couldn't imagine it any other way for myself.

Hopefully I won't be eaten alive for saying this, but I believe a dog can be outside all the time and still be just as happy. It all depends on the location and the dog itself. I know a dog who prefers to be outside 24/7 rather than inside a house at all... and this is one of the most spoiled and happy dogs I have ever met. He's 10 years young and guards cattle owned by my uncle. He doesn't have any fences or boundaries, just acres upon acres of land to run until his heart is content. He's mean as a snake to anyone who isn't family so we don't have to worry about him much.