My in laws have a 4 year old Corgi and  she has been dragging her hind legs around for the past couple days. They took  her to their vet and he said it could be a slipped disc but couldn’t be certain  without an MRI. 
He also said if it needs surgery, it  would only give her a 33% chance of using her hind legs. 
A fellow co-worker of  mine breeds corgis and said he had experienced the same problem with one of his  dogs. He took his dog to several vets and they all said the same as they told my  in-laws. One of the specialists recommended Chiropractic care, so they went to a  person in southern Connecticut and they  performed some type of laser therapy and after four or five visits the dog could  walk fine. 
So we’re looking for any  animal chiropractors in our area and also asking if there is anything else that can be done for our dog. The vet they  took her to said that if she can’t be healed that she should be put down,  due to the fact that my in-laws couldn’t afford the six thousand dollar bill. 
We want  to at least try the chiropractic procedures before we make such a drastic  decision.    
Thank you for any help you can give.