Maybe 30 minutes, and the flies where gathering. Would you say those where likely laid after dispatching? That I can handle. I was thinking a living parasite or something.Was he left outside for a period of time after dispatching and prior to processing ? It doesn't take them long to lay a bunch of eggs.
... Yep, those are fresh. It takes no time at all for blow flies to lay eggs in the mouth, eyes and nose of expired animals. They always go for the mouth first.