As you may know I had Heidi and Maggie. Both are (were) small and kenneled in our laundry room while we were at work. You asked them to "get in their beds" and they walked to the room and climbed in their doggie beds. Maggie was 4 when adopted and about the mellowist dog. It isn't funny now but we used to say "if she was any calmer she'd be dead". Heidi is almost 8 and really energetic but she loves being in her bed during the day or when she is tired. We still play with her when we get home (she doesn't like walks). So I think it is perfectly fine as long as it fits the dogs personality or needs. My miniature schnauzers did not have high exercise requirements. A heeler, young lab, pointer or a dog that needs a job and a lot of exercise I wouldn't leave home 8 hours.
Before we owned a house we lived in an apartment (900 sq ft), the girls lived in the bathroom behind a baby gate during the day and got a morning, afternoon and nightly stroll to potty and investigate the outdoors. They seemed content.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan