Sad but not unexpected.
I just read up on aspiration pneumonia. Poor fella probably inhaled too much of his own slobber or snot while running, or wolfed down chewed-up kibble too fast then he was panting, and got it into his lungs (probably the former). I could see the kibble, too - we have five cats, and if the wife gets out the bag of cat treats, it’s like watching Joey Chestnut vs. Kobiyashi in a Nathan’s hot dog eating contest. Ten minutes later, there would be at least one pile of barf somewhere in the house that looks like a Stuckey’s nut log. We used to have a fat Dachshund who, when she ate, looked like an old steam-powered backhoe digging a trench to lay a new water pipe.
“Sad but not unexpected.”
Running is in their Genes. God Bless these Magnificent Creatures.