You did the right thing for Finlay, even if it feels like it wasn't the right thing for you. You know you did the right thing because you didn't want him to suffer. Still, you feel lonely pain because he's gone. Even doing the right thing can still hurt.Yes it does hurt like HELL! Everyone keep telling me I did the right thing putting Finlay down, but it does not FEEL right to me!!
Even if you had postponed Finlay's end, it would only delay your pain. You would still miss him.
You did the best you could for Finlay. It will take some time for the hurt to soften.
I'm praying that your pain and sorrow will be comforted.