Get Your Dog Care Questions Answered by Experts
If the dog is having GI difficulty and you see the dog passing the bedding...I am not sure what further diagnostic tools are needed.
I know you don't use credit cards, but you may want to apply for a PetCare CareCredit card ...which is a charge card for the dog.
The dog will most likely need abdomenal surgery, I recommend you talk with this vet about proceeding. You need to at least come up with a deposit...and even set up a payment plan...but the dog needs treatment.