[P-did]

And it sounds like you believe everything you read.

A bit rude to say; of course that's not true. But if the reference comes from a professional with more years of experience than any of us, it's worth some consideration. If you're really a professional dog trainer, you will enjoy the book I suggested: "The Social Lives of Dogs". The author also wrote a famous book among dog trainers called "The Hidden Life of Dogs". Both books are packed with information about dog psychology.

Of course we shouldn't believe everything we read, but reading and studying text from experts with more experience than any of us is a key part of reaching the top of our games in any profession. Just because something works decently doesn't mean it's the best or most humane way. Keep reading and studying to improve your trade.

It looks like we will need to agree to disagree on this entirely!

That's fine. But since I provided two references on this thread, please provide me with a few sources which support the notion that it's appropriate to crate a dog for 6-8 hours daily? The credible sources that I've seen agree that eight hours is tolerable for the dog if needed now and then, but not to be done regularly.

Here is another source that informs on the harmfulness of regular long-term crating:

http://www.greyhoundog.org/Faq/GreatCrateDebate.html

Here's a direct quote from the author of the above article, speaking with over 20 years of experience with over 4,000 greyhounds:

Crating is not the great panacea many people would have you believe. A crate should be a tool to be used only in the short-term, if necessary, and under special circumstances. I tried to come up with at least one example of those special circumstances for this article; I couldn't. Truth is - the reason people crate greyhounds is almost always for convenience.
In my more than 20 years of working with greyhounds and placing well over 4,000 of them, I have never come across the dog or the circumstances that would make using a crate necessary.

To put it simply, crating is cruel and unnecessary because there far superior alternatives: such as a puppy proofed confinement area with a litter box. It could be a play pen or a gated-off area of the kitchen floor. The dog should enjoy as large of a roaming area as possible without putting the dog and your possessions in danger. The "confinement zone" method should always be the first option attempted, and crating should be a last resort. With the confinement zone method, you gradually increase the confinement area until eventually you train the dog to be trusted in the house. With long-hour crating, the dog never learns.

I just pray, for the dog's sake that you cease from recommending long-hour crating. I have more sources than I can count that suggest it is not only unnecessary, but abusive.