My first dog, a Yorkshire Terrior, did not mind her kennel at first. We would put her in there everytime we left or went on vacation, and she didn't mind. But about 6 months later, she would bark nonstop when we had her in there. We don't keep her in the kennel anymore(she's 5 years old). But...
I came 30 minutes early and the place smelled bad, there were feces in many of the cages and some of the older pups were isolated in small 12x12" cages. This seemed to me more like a puppy mill or hell hole. Did I catch them on a bad day that employees were sick or what?