re: Dog's eye is swollen shut (Added pics) & Update!

Had a lab once that liked to go fishing for turtles. He would dig holes in the shallow end of a pond about three feet from the bank and periodically check them for turtles. He caught a bunch but that's not all he'd get.

He got at least two snake bites, one on his lip and one on his ear that sound similar to your dogs injuries.
I never saw any blood from it, just a golfball sized lump that went down after a week or so. My moneys on a snake bite.