Deepak, you need to take your dog to a vet. Immediately. It should already have been done. If your current vet is not doing anything for him or giving you good information about what's wrong, put your dog in the car and drive him to a vet that will help him. No one here is going to tell you anything different. We are not vets. You are wasting your time fooling around on the computer when he needs immediate medical attention.