Get Your Dog Care Questions Answered by Experts
What breed of dog is this?
are all four legs having problems or just the back?
Thank you for that information. There may be a disc problem going on and that can be very painful. There could be an infection in a disc or the disc could have ruptured into to spinal canal. This will require immediate help. You will have to make a muzzle for the dog so you are not hurt. Place the dog on a flat board and bring him to an Emergency vet.
directions for making a muzzle: http://www.petplace.com/dogs/make-a-dog-muzzle-vet-s-advice-on-making-a-dog-muzzle/page1.aspx