HERNIATED DISC. CAUSES.

Conformation: Dogs with short legs and long bodies, such as a dachshund, corgi and pekingese, are prone to disc problems in the back. Excessive movement and stress or placed on their back because of their shape or conformation.
All these breeds, because of their conformation, can herniate a disc in the normal daily routine of running, jumping, twisting and turning when in play.
Beagles are prone to disc problems in the neck and back.
Injury: Severe trauma such as caused by motor vehicle accident.
Next time I will tell you what signs to look out for to tell if your dog has a slipped disc. Cheers.