Yeah Limey, and Fat Bill once put out a keep that called for using Corn Flakes. He probably won more shows that me too, but that doesn't mean the guy knows anything about nutrition. Smith & Walton fed Ol' Roy when I got there, and he won a lot of shows too. Winning contests and making a profit on the kennel isn't a good measure of sound nutritional choices. In fact, if profitability is a key driver, poor nutrition likely will provide a much more attractive return on investment.
Generally dog people of any fancy are blind idiots following idiots with a little more, yet still limited vision. So these "knowledgable" Greyhound fanciers may not be knowledgeable whatsoever. In fact, I am supposing that because they keep hundreds and hundreds of dogs and cull a majority of them, that this feed choice has much more to do with
economics than it does nutritional benefits.
