My girlfriend had a Great Dane (sadly, just passed away) that was huge - 180 lbs, her head came up to the middle of my chest. That dog would eat anything on the counter. I can't recall how many loaves of bread that thing polished off. The crowning achievement was when she (the GF) made a big batch of fudge for her brother for Christmas, it was over 5 lbs of fudge. She had it all wrapped up and boxed to go to the post office the next morning. She goes to the store, comes back, and there's nothing left but a little bit of the box. Everything else disappeared. The dog **** like a racehorse for several days, but suffered no ill effects.
Way back in the day, I went to a friend's mountain cabin for the weekend. They were making beef stew for dinner. We were out of beer so figured we should make the beer run while at least someone was still sober enough to drive. Earlier that morning, a stray dog had decided to "adopt" my friends, they let it in and gave it some dog food while trying to figure out who it belonged to. We go to the store, come back with provisions, and the stew is gone. G-O-N-E. As if it never was. The pot had to have held several gallons. The pot is lying on its side on the kitchen floor, the stove burner is still on, the dog is sitting there looking innocent, and there is not a trace of stew, even a drop, to be found. And this dog couldn't have weighed 30 lbs. To add insult to injury, they can't find an owner so decide to keep the dog, which promptly provided them with nine puppies!