Are Soy Beans Bad For Dogs?

I really have no idea how good soybeans as such would be for dogs. What that link says may be true. However, I fully intend to continue to to feed my dogs Pro Plan that does contain soy products. I have seen some other material on that site I don't trust. I don't trust much of what I read here. Anybody with a agenda can post all sorts of misleading information. Knocking the competition is quite common in the dog food business.