I'm a bit hesitant to post this because I can't really believe it hasn't been posted before - but I've searched the community through tags, and googled using every term I can think of, and I see nothing! So here goes.
Two-faced cats that lived past birth.
Lil'BitFrankenlouie Yeah, some of those images might be disturbing to some people. Although I totally want to hug both of them.
Anybody seen any other examples?
Edit: I just wanted to add some links to show that just because an animal seems like it might be miserable doesn't mean it is so.
Rolling Dog Ranch takes in disabled cats, dogs and horses.
The Gentle Barn is the came concept, only with more types of animals.
Rescue Ink rescues abused animals, gets them any medical aid they may need (including spaying or neutering) and rehabilitation if needed, and then places them the best they can afterward.
A bit off topic for wtf_nature, but looks can be deceiving. A long talk with a good vet is of course in order when you're dealing with a special needs animal, but there are so many stories of special needs animals who've gone on to live full, happy lives with people who have the time and money needed for such cases, I just don't like the idea of putting one down based on a "maybe".
I don't mean this as a political statement or anything like that, I just know how much love I've given and received with my two cats, and I always wish I had the time and funds available to take care of animals with special needs. It breaks my heart to think of them being put down.