I don't think it's the most healthy way to eat for a human. Animals and humans have different nutritional needs. However, when my niece was 5 or 6 she got it in her head that she liked dog food and treats. If I gave my Lab something, she had to have one too. I was always worried she was going to break a tooth. She always said they tasted good, though now, she denies it. She never got sick from it, so from that standpoint, it seems to be okay.
I have read that many elderly people supplement their food budget with cat food. It always smells salty, so I would think it's high in sodium. Though, I have never checked.
