What breed dog do you have?
Was he playing before this happened?
Has this ever happened before?
What type of medication have you given?
If you pinch between his toes does he have feeling?
Has he been able to urinate or pass stool?
This may be from an injury, but I am also giving you inormation on what I suspect. It is called IVDD Invertebratal Disc Disease. It is similiar to a Herniated Disc in Humans. This will need to be treated by a Vet. They will need to do some X rays, a Mylegram or an MRI and a complete Neurological exam. Until you can get into the Vet you need to do complete crate rest. If Caine needs to use the bathroom, then you will need to carry him out and carry him back in. In some cases he may not be able to have a bowel movement or urinate do to this problem. You can try and assist by using a towel under the abdomen to support him. In many cases surgical repair is needed for a severe injury. I am going to give you some information to read about IVDD. These are the links to go through:
Please do not give any more apsirin or medications until you can see the Vet. When you give over the counter medications it may postpone the pain meds and anti inflammatories that the Vet can administer due to a contraindication. You can alternate ice and heat to the spine and keep him crated. He will need to get to the Vet asap. If you would like to get him into an ER Vet I can locate one for you with a city, state and zip code. make sure you alert the Vet to what you have given Caine. I suggest that you protect the syomach, you give Pepcid AC. The Dosage is here in this link, scroll down to pepcid as it goes by weight: http://www.walkervalleyvet.com/otc-meds.htm Joan
Better to not give anything. Pepto also has the ingredients of aspirin in it. As far as this may be a degenerative issue, but until examined hands on, we will not know if this is a pinched nerve or a disc issue. It will be important to allow him to remain still as much as possible and see the Vet asap. Joan