I agree legislation isn't required here.
My dog had to be taught that it was unacceptable to help herself to all the tootsie rolls in the cat box. But you can throw an entire hamburger into her mouth - she'll gulp it down and spit out the pickles.
And it's funny you say that about what they won't eat. My buddy had this stuff call Phooey! that he was supposed to spray on what he didn't want the dog would chew. - His dog would actually run over to lick the stuff up - she loved it.
I thought it would be funny to taste it myself. It wasn't. (to me at least, but my buddy thought it was exceeding funny.)
exceeding=exceedingly