One more little experiment to try before deciding there was a big issue...
I took a tiny piece of Isaac's breakfast sandwich (turkey, cheese, croissant) and offered that to Dublin. He not only took it and swallowed it, but he followed me around begging for more.
Hmmmmm..... what we have here is a case of a picky eater!! I don't think (although who knows what the kids do when I'm not looking) we feed him much in the way of people food. Not intentionally anyhow. But the counter surfing and dumpster diving must have given him a taste of what he's missing, and he thought he could shun the puppy food in favor of the people stuff.
Not gonna happen.
I told the kids right away not to give him ANYTHING but puppy food. He will eventually get hungry enough to eat what is being offered to him.
He held out all morning. And much of the afternoon. But by about 4:00, he finally gave in and started nibbling at his food. I noticed, though, that he was still taking the food out of the bowl, dropping it on the floor, and then picking it back up to eat it. Well, over the weekend I had gotten him a food bowl thing that stands about a foot off the ground (to keep the ants out, and also because I guess it's supposed to be better for them to eat this way??). Apparently, though, he is not a fan of elevated food, because when I put the bowl down on the floor, he chowed!! Empty bowl. Full puppy. No issues. Just a picky picky eater.