My Beautiful Puppy Daisy

I had to eythanize my 7 month old puppy 2 days ago. I have lost dogs befoe 2 to old age and 1 to lymphoma, but this was the hardest thing I have ever had to do. Puppies should have the opportunity to live a happy healthy life in a loving home and these are the dreams I had for Daisy. I adopted her a month a go from the Los Angeles animal shelter because I thought I was doing the right thing and saving a life. Their vet and the vet who spayed her said she was fine. When I got her home she was very sick. My vet diagnosed her with pneumonia and put her on antibiotics. She did not get much better and one night I rushed her to an emergency hospital who unbelieveably stapled a oxygen tube to her nose with twelve staples!!! My own vet later took them out and she had to have a couple of stitches. She continued to struggle so my vet suggested taking her to Calif Vet hospital, they had medicines He didn.t. She was assigned to two very young insensitive doctors. She was there for a week came home for a very happy energetic 3 days and then I guess i panicked. She seemed to not be breathing comfortably so I took her back. I think I broke her spirit because she stopped eating and did not respond to well to her meds. She was off them a whole day which is another part of my anger and frustration with the decisions that were made there . They are doctors shouldn't they know what to do I am now out $6,000 and I sit her witout her. I miss her and so do my other dogs. I did not have her very long but this is so heartwrenching. I can't stop crying and feeling guilty for bringing her back after she fought so hard to get out of that place she was in isolation, and now so am I.