Here are some possiblities:
1) Dr. Moreau has relocated to the neighborhood
2) A secret sequel to STAR WARS starring Chewbacca
3) You are sniffing or snorting some fun drugs and we want to help
4) One of your genetically altered snakes became a very large mammal
5) Backyard Mechanic and Joe B. are wearing fake feet on your property
6) You are working Corvette Florida way to hard causing hallucinations. I would suggest joining Corvette Anonymous so you can get on the couch to discuss your problem.
I hope this helps
. Seriously though, it sounds like a black bear with mange as SteveK described.