Wind.....

[Richard Flanders]

Nice Destry! Maybe that first one had worms. I killed one once that had a huge knot on the top of his head that turned out to be some kind of worm the size of the end of my little finger when I cut it out. It was something like the bot flies that infest our caribou up here and which bore in under the skin when the eggs hatch in the fur. The one I found had a breathing hole in the skin which is likely what you were seeing or it may have already have matured and crawled out and was healing over. They're harmless but definitely gross under any circumstances.