Here is a different view:

Did you get your dog from a good breeder? I know Remy didn't even come from a breeder, just an oops breeding. They know nothing about puppies. So they didn't know they had to clean up after the dogs. Remy hadn't seen the outside until we picked her up at 7 weeks. Therefore, she knew to live in her feces and peed and pooed in her cage all the time. We still cannot give her a pillow in her cage because she's pees or poos on it. She is a year old.

I can't say that you shouldn't leave your dog in a cage for hours on end because we have to do it with our pups. It's not like someone can be home every hour of every day. Although it is suggested you do not leave a five month old pup alone for more than 3 to 4 hours.