Red foxes kill fawns regularly, just find your self a fox den with pups, fawn heads and legs are used as toys after eating fawn.....

I've seen it. Probably five years ago or better, when I was bowhunting in November, I watched two reds chase a fawn around for 20 minutes after they separated it from its mother. They finally got it down and both of them were on it. It kept struggling and got away with them still chasing and biting. Found it the next day about 200 yards from where I watched them partially cached with leaves with the hind quarters eaten from it. Called a friend who's a biologist and wildlife manager with DNR. Said he'd never seen it before. If I remember it was a really dry year so maybe other food sources were pretty scarce.

Nope. I seriously doubt a tan pound red or grey poses much threat to a deer.