Audie, I'd take Dory to either a university vet school or a veterinary internal medicine specialist. Sounds like she needs to be on IV antibiotics, in addition to an ultrasound.
Our sweet Winnie had kidney disease. One infection led to bacterial endocarditis (as was later diagnosed). She didn't even seem sick to me, but one morning I went to the garage to feed her, and she had dragged herself from her bed and was trying to get to the back door. Her legs were paralyzed. A clot from the infection in her heart went to her brain, and she had a stroke. My husband was in Asia on business. Thankfully a FedEx delivery person just happened to arrive at our house. He helped me take the top of her crate off so she had something secure to lie in, and then he picked her up and put her in the crate in the back of my husband's SUV. I drove her to Auburn vet school, and they put her in ICU. We drove down every day to see her (except my daughter's birthday) because the doctors said that might help her recover. They were going to start water therapy for her stroke, but she kept having seizures from the blood clots. Finally they told us that there was no hope for her and that she was in misery, so we had to euthanize her. I prayed to God that he/she would take care of it so we wouldn't be forced to make that decision, but it didn't happen that way. That was January 2005.
See my 'tar? Our daughter has been missing Winnie a lot and recently created this graphic for her online portfolio.