Sorry, no real choice but to consider surgery ( if it already hasn't been done) otherwise your dog could die in fairly quick time. Your Veterinarian should at least have run some xrays, blood work before the time so that he knows what he is dealing with. Your dog should be kept on iv fluids during and after the op, and you should know if with all of these procedures to help ensure safety, there is no guarentee of recovery.
Martin Slome DVM
Centre Street Animal Hospital
7700 Bathurst Street Units, 40-42
Tel. (905) 771-9855