Dogs experience pain in different ways. Sometimes they pant, pace and or just become lethargic.
Dogs will often continue with normal activity despite pain since this is a survival mode. It is always a good idea to have your Vet check your dog to rule out disease and organ involvement.
If the cause is not a Vet issue then Chiropractic can be the answer. Back pain will be treated w pain meds by your vet, but the animal chiropractor needs to evaluate your dogs spine and nervous system along with all 4 limbs to find the problem. Your Vet is not skilled in finding spinal subluxations that affect the nervous system, and I can say this with confidence since I am an instructor at an Animal Chiropractic College.
When a spinal subluxation exists it can pinch nerves and thus cause pain and lameness. Chiropractic adjustments, exercises and cold laser will often correct the problem.
I make home visits exclusively so that your dog is most comfortable.
Please contact Dr Bruce at 781-337-1180, email at Indekchiropractic@gmail.com and my website has video demo as well indekchiropractic.com