I feel your pain. My last German Shorthair went off her fed after a weekend of hunting. by the next weekend I took her to the vet in Seattle and charged me $400 for x-rays and came back that they thought she had heart problems but the meds would really expensive. She snaps out of it and about a month later she goes off her feed again so I take her back in and another $400 for more x-rays and still nothing but this time there maybe a touch of pneumonia. She snapped out for about a couple weeks until I noticed she was having a hard time breathing and her coat was pretty mangy. It was a Saturday morning and she just stood there looking at me like she didn’t want anymore pain.
So I took her in to the same vet and he started out with they wanted to take more x-rays. I told him with all due respect that I wasn’t going to pay for them, that I had over $15,000 invested in this dog, she was a world class and bred shorthair and she need to be put down. He agreed but would take x-rays at no charge just so they could see what was going on. Turns out that she was ate up with cancer but it took 2 full doses to put her down. I never cried so hard in my life. She was just 8.
That’s said. Dogs our are partners and friends. Best listeners.