I too know that feeling, one of our cats stopped eating and was fading fast, so the decision was made, as I took her to the vet she was so weak we had the basket open, in a last effort she crawled from the basket onto my lap as I drove, A last great effort, a few minutes later at the vets she had nothing left, it had been one last effort just to sit on my lap, I was there with her as the deed was done and she found peace.
There is a time that comes when the only thing left is to grant them peace and rest. and it is hard - so hard, and it still brings a lump to my throat and a tear to the eye.
my sympathies, and , just remember you will meet again in the future at the rainbow bridge.
Grendel