The Jacobsen article is a lot less sanguine than the CNN report. In effect, it turns out that all those fish you see are maybe just a bit too big for the little puffins to swallow. According to Rowan, last year puffins began bringing home butterfish to their young, not that hake or herring that has traditionally been the fish that little puffins have always loved to eat. Heartbreaking "puffin cams" documented baby puffins starving to death, in large numbers, as they tried, and failed, to eat the bigger butterfish.
Yes, this is another global warming warning story.