I can relate to this. We had a cat that we rescued after finding him hit by a car. We paid to fix him up from the accident which cost us more than $800 and that was after the vet kindly gave us all sorts of discounts and things for free. Yes, I am a sucker for animals...I hate to see them mistreated and love to help them get a second chance. I had gained this cat's trust over a several month period before the accident so when I saw him knocking on death's door, my husband and I agreed that if he survived, he would live out his days with us.
He became my "first baby" and would literally lay in my arms like one. He was extremely lovable for being a cat and had a 6th sense if people weren't fond of them. More often than not though, he even won the non-cat people over.
A couple of years before we moved to NY he was diagnosed as having diabetes. For 2 years we gave him daily injections and special food and took him for bloodwork every 3 months because his levels would come down but only so far. He had accidents constantly because he couldn't always make it to the litter box and would go so much that he literally burned through 2 of the automatic litter boxes. He also stopped being a lap cat and would go lay in a quiet corner of the upstairs hallway instead.
We found out we were moving to NY and I couldn't think of a comfortable way to get him here because of his bathroom issues. He could never have done the car ride and honestly, I don't think he could have lasted the airplane ride either. I was loving on him one night and realized I had been keeping him alive for my own reasons and putting him through the move was going to be torture for him no matter what we did. I decided with a VERY heavy heart to have him euthanized.
My mom went with me to take him and even today, 5 1/2 years later, it brings me to tears. I don't regret putting him down. I would have loved to have had much more time with him. My oldest son was just under 3 at the time and he adored him and the cat was absolutely wonderful with him. We should have been able to have more time with him as his age was only guessed to have been about 10 or so at the time. He was still young but I know in my heart, he wasn't the same...he didn't feel well. He hated the shots and constantly going to the vets. I knew it was the right thing to do for him.
In my heart, I know we gave him a wonderful last 7 years of his life after we rescued him. Maybe for the first time in his life, he knew what it was to be loved and to be part of a family. The ONLY regret I have is that I wasn't strong enough to be in the room with him. It is something that times like this when I think about the story that I feel a wave of guilt come over me still. I wish I had been stronger to be there for him. My poor mom didn't know whether to go be with him or stay and comfort me. Of course she stayed with me but you could tell even she was torn. I guess even though I knew I was doing the best thing for him, I didn't want to let him go and I still felt guilty that I couldn't make him better. I don't know why...I knew I couldn't...I had been doing all I could for the 2 years before but his levels were always still very high.
I'm sorry for the book...just trying to let you know you aren't alone I guess. The reality is, your dog is 16 so he has lived a long life. The only way I would do hospitalization is if it could make him better which it doesn't sound like it could. It sounds like his time is just coming. I know what it must make you feel to see him not be able to hold his food down, to not be able to make it to the bathroom, and to look like it is such a struggle to move. Of course he may still be smiling at you! He still loves you because you have loved him. It doesn't mean that he isn't feeling horrible though which means you have to decide if he can get better and if that occasional smile is worth watching all the other things.
I will give 2 suggestions though. 1) If you do hospitalization, ask the vet if he has private pet insurance. Ours offered it for $200 the first year and it gave us half off any service or product. It saved us almost $700 that first year. 2) If you do decide to euthanize, just spend lots of time with him before you take him. Tell him how much you love him and make sure you have some pictures to remind you of all the good. I have a bunch of our cat with my oldest son as a toddler that are just adorable but my fave is probably one of the ones from my wedding day. Yes, I had a couple of pictures taken of my cat (who was a black and white tuxedo marked guy - how perfect!) and me in my wedding dress. They all help to remind me that again, he knew love because of us and I euthanized him BECAUSE I loved him and didn't want to see him suffer anymore.
I wish you the best.