That is really tough
We have an 18 1/2 year old dog who has been having more good than bad days lately, but it is only a matter of time before I think we will have to put her down. She has back problems and there are days when she really can't get around. If she seemed like she was in pain, I would have made the trip to the vet awhile ago. I made my dh go & talk to the vet about what we should do because I just couldn't handle it. Our son will be here next week to help me out and I wanted him to see her again. They grew up together.
I feel your pain....
So sorry. We are here for you!.