What do dog and ‘human’ food have in common?

I've just got round to watching a programme, which aired on Thursday 30th January. It was called "The Truth about your dog food" and it was on Channel 5. A Daily Mail article was published a couple of days before the programme.
The article mentions a book by Jonathan Self, who is featured on the programme. The book is called "Honey's Natural feeding handbook for dogs" and I have found it a really ...