The Purina Diet Yesterday I was at Costco buying a large bag of Purina dog chow for my loyal pet, Necco, the Wonder Dog, which weighs 191 lbs. I was in the check-out line when a woman behind me asked if I had a dog. What did she think I had..an elephant? So because I'm retired and have little to do, on impulse I told her that no, I didn't have a dog, I was starting the Purina Diet again. I added that I probably shouldn't, because I ended up in the hospital last time, but that I'd lost 50 pounds β¦