The pair of verterinarians currently in my livingroom agree:
Use your head - it is either injured or diseased. It is wild. It is not used to, nor does it desire, human contact. Don't touch it if you can avoid it. Call your local animal control officer (the police will usually be able to hook you up). Don't let your pets near it.
Use your head - it is either injured or diseased. It is wild. It is not used to, nor does it desire, human contact. Don't touch it if you can avoid it. Call your local animal control officer (the police will usually be able to hook you up). Don't let your pets near it.