If it was a Whitetail, 200 lbs ain’t no slender deer...LOL
I'm just guessing, and I don't know the breed of the deer.
I got chased by a doe with two fawns a couple years ago early in the morning at the track I run at.
She was definitely 200 pounds. I've worked around horses, and people are usually shocked at much horses weigh.
I live by the rule that any animal that has survived in the wild for thousands of generations is a muscle machine!