Good job Mike, the right thing to do.
I've never had that situation with a deer but i did have to shoot a cripple goose when i was in high school. It was a wierd feeling cause i was pheasant hunting and didn't even have a waterfowl license, so it was illegal, but i still knew it was the right thing to do. Poor thing couldn't fly and could barley swim, but had lived long enough to basically rot from the inside out, it was nasty.
Was it 13 degrees in Texas! yikes.