About Sadie's response to the meds...Let me lay out a picture for you:
Sadie started coughing around Halloween. Just a few times a day and it was a very mild, dry cough. I wasn't even concerned. I thought perhaps a little Kennel cough. Her breathing was not labored at all. I was a little more shallow and rapid, but not enough for me to even notice it. Looking back, I can tell now that something had changed because I noticed she wasn't getting up on the sofa very much anymore. She seemed to prefer the floor. On Nov. 10th I brought her into the vet because she still had the cough AND then she was turning down people food. The turning down people food is what made it click that something was wrong with her. She never really looked very ill to me. The vet who saw her was telling me about respiratory viruses and I could tell he was considering kennel cough as well. He mentioned maybe taking an x-ray but wasn't very serious about it because she looked so good. I told him to go ahead with it just for peace of mind. That's when it all started. Her lungs were filled up with white on the x-rays. I was not expecting that, and neither was the vet. He told me right then it was either blasto or cancer. He really thought it was blaso because she looked so healthy. He could not feel any tumors on her physical exam. So that day we started the antifungals along with Doxycycline. He said to give the Doxy just in case the had some sort of bacterial infection in her lungs. She had a fever that day at the vets. He took a urine specimen and sent it off to Mira Vista. We went home and I wasn't very worried. I had no idea how bad blasto could get at that point. After I did the research in the internet, I was a little scared and worried about her. This was on a Wednesday.
That night her appetite still declined a little. She was turning down some treats, which she never did. Then that night, Tuesday night she jumped up onto the sofa and that was the first time I had ever seen her with labored breathing. We went to bed and she did the same thing when she jumped up on the bed. Labored breathing, which settled down after a little while. I was nervous enough to get her into the emergency vet that night. But by the time I drove her there, she seemed ok. Breathing was shallow and rapid, but not really labored. She was 12 hours on fluconazole and doxy by that point. They kept her overnight just to watch her. I picked her up early the next morning and had to take her back to my regular vet. She seemed ok that morning, but I could tell she was ill because when she came out to me she didn't even jump up on me like she usually does. She just wagged her tail. This is now Thursday morning.
We got in to her reg vet on Thursday morning and this is the first time he saw her. The vet we saw on Wednesday was another vet at the same practice, but my reg vet is off on Wednesdays. My reg vet got a run down of the past 24 hrs and looked at her and then looked at me and told me the next 7-10 days would be difficult and that she might not make it. But if she pulled through the next week, he felt she had a chance to beat the blast. (now we are assuming as this point that it was blasto). He gave me his cell number to keep in touch over the weekend and told me it was prayers and luck that we needed. She looked that bad just 24 hrs after starting meds and our initial vet visit. I took her home and she seemed to hold her own all day Thurs and Fri. BUT Friday night she took a turn for the worse. She jumped up on the sofa and labored breathing started again. BY the time we went to bed it was getting really bad. I almost brought her back into the emergency vet that night, but I decided against it. I thought for sure she was not going to make it through the night. I didn't want to stress her any more than she already was. It was so late and my vet had turned his cell phone off for the night. I went into my medicine cabinet and found some prednisone. I gave her some and layed with her and hugged her all night. By the morning she seemed a little better. When I woke up I was suprised and excited that she had made it thought the night. (it was Friday when we got back the negative blasto test and knew that she had low platelets and anemia, but he wanted to know if she could have been bitten by a tick and I told him yes I had pulled one off of her in the early summer).
Now it's Saturday morning. My vet called me back and we talked. He told me to keep her on the steriods since they seemed to help and she had gotten so bad. We were 3 days on antifungals and antibiotics. Saturday afternoon she started eating again. She looked so good. My vet called to check on her and he was excited to hear about her progress. He told me then that he thought she was responding to the doxycycline and that he really thought there was a chance she could have had Ehrlichia. Her positive response was at the same time you would have expected to see one if it were a tick bite. He told me to have her back in on Monday and we would test for it. He thought she looked better by Monday. We continued to have rapid shallow breathing all the time by this point. It was labored off and on when she jumped up on the sofa. About a week later we had more episodes of the labored breathing. The next Saturday she had a rough day but got better by the night. Sunday day was good too, but Sunday night she wasn't doing well at all. SHe didn't sleep much. She drank tons of water (a side effect of the steroids and the fluconazole). Everytime she layed down she was breathing labored. We were staying in the living room by this point. I quit sleeping in the bed because it was too hard for her to get up there. She didn't get onto the sofa but once or twice that last week. But Sunday night she had trouble just laying downa at all. I couldn't see her go through that any longer. With the negative blasto test - the blood work looking more and more like cancer - the negative response to tick borne illness treatment (doxy) I just knew in my heart it was cancer. Even though we had done an ultrasound just 5 days before and found no obvious tumors I still knew in my gut. We tried everything and treated for what we thought could be treated. But I had to let her go. You can't ask a dog to stay here and not be able to sleep much. It was too hard on her to just lay down. I called my vet on Monday morning (the week of Thanksgiving). I cried my eyes out telling him about her weekend. He told me it was time. He gave me the option to try high dose steriods as a last ditch effort, but I declined because I knew the belly bloat from the increased water consumption would be really hard on her. I brought her in that day and put her down. It was the worst day of my life. He did a lung biopsy after he euthanized her. He called me the Friday after Thanksgiving with the results. It was Hemangiosarcoma. A very agressive cancer with no cure. There was nothing we could have done to stop it, to slow it down, or to make it go away. Sadie never really suffered much - just the 2 bad nights and a few moments here and there. She ate so many of her favorite people foods her last week because of the steriods that brought back her appetite. Without them she was a sick little girl. With them she was still a sick little girl, but she was a little more comfortable and happier. So fromthe time we started meds until the time I put her down was 12 days. I hope this helps you out.