I saw plenty of those over the last 2 days. Probably 25+ dead deer between Grand Rapids, MI and the Indiana border. Most were just laying on the side, but several had been smeared for dozens of yards. Looked like a 5 gallon bucket of red paint dumped on the road ending in a pile of furry hamburger.
I guess I'd just say, don't confuse a live body actively bleeding with a dead body leaking or smooshed across all the lanes of traffic. Worst one I saw yesterday was in 2 lanes between concrete barriers with no shoulders. Probably 75 yards of gore.