What is age of your dog? What other symptoms your dog is having? Was he sick before this problem? Medical history and physical examination are needed to diagnose problem in your dog. If your dog is unable to move then he might be having injuries. Arthritis can be another reason. Old age of the dogs can also reduce mobility.
If your dog is lethargic then it is sign of almost all diseases in dogs. In my opinion, don't wast your time and take him to vet for proper diagnosis and treatment.
If your dog is lethargic then it is sign of almost all diseases in dogs. In my opinion, don't wast your time and take him to vet for proper diagnosis and treatment.