I feel very sad for animals that have been killed on the road, too (apart from a pheasant that flew into our car a few years ago - I was in tears about the poor bird until we saw the hundreds of pounds-worth of damage it had caused!)
Today, on the way home from a short break away, I saw a badger on the grass verge, and to see such a beautiful (or any other) animal wiped out - hopefully very quickly, is horrid. We can only hope that these poor animals died straight away.
Last night I was watching the local news in our hotel room, and it was reported that a tethered horse had been left to die on a piece of ground in the middle of a housing estate. (I can't remember the name of the place). The complaint was that people were having to walk past the corpse of the poor thing as they were taking their children to school. Why, why, why did they not report the creature to the RSPCA before it collapsed and died? One elderly lady was upset, saying 'They rely on us, don't they...it's just so sad'.
phoenix, there's nothing wrong with feeling as you do, just now. It'll pass. In the meantime, you know where we are.