Hi, I'm Dr STeve
In my experience what you are describing could be an injured IV disc in the back. When this occurs, it pushes the IV disc in the back up into the spinal cord. THiscan occur with relatively mild or minor activities like jumping off furniture or twisting when landing . Once the IV disc is pushed upwards, as long as the dog maintains a relatively level or flat posture the IV disc seems to stay down where it belongs and causes littel problems. However when a dog begins to raise the fron tlegs to get up on furniture or go up stairs, the change in the angle of the vertebrae can cause the IV disc to be forced back up into the spinal cord and cause discomfort, MOst dogs try to avoid any activities that cause this to occur.
The treatment for this problem is typically steroid injections given by a vet. This helps reduce the swelling and inflammation in the spinal cord as well as the IV disc itself. If the injury is minor, then with the treatment and a few weeks of restricted exercise ( to avoid further damaging the disc or the spinal cord. ) often takes care of the problem. He should be seen by a vet as soon as you can to get this treatment . IN the meantime try to minimize his activities and keep him quiet so he doesn't accidentally push the IV disc too far in to the spinal cord and cause more severe and possibly permanent damage,
I hope this has helped. If it has would you please click the accept button so i may recieve credit for my answer. Thank youu and good luck. If you have more questions, please continue
I will check shortly ot see if you have more questions.
Thank you Dr Steve. I have accepted your advice and will call my Vet immediately to make an appointment.