Maybe Dad's bulk tank got so full by the overuse of that dangerous chemical, dihydrogen monoxide. That's what
this web page would probably claim, anyway. Check it out and follow the link at the bottom to the main page. But whatever you do, don't stop reading before you get to the priceless exchange of letters between the page's creators and the editor of "Hoard's Dairyman." (And Dad, if you know, what on earth does the editor mean when he says, in the first letter, that Hoard's "reverses the rear legs on professionally photographed cows"? How would they do that? Why would they do that??)