Oh lorn, please don't be sorry for posting. There are many people willing to talk to you here. I assure you, if it was Thunder's time to go, you gave him the greatest gift of all, peace. He is no longer in any pain, but young and healthy again at the Rainbow Bridge. You will see him again someday. It really, really hurts, I know. Try to dwell on your happy memories of Thunder. In time the pain and hurt will ease. Rest assured Thunder's spirit is still with all of you, a part of you and always will be.
Im sorry for posting on here, I just thought maybe someone would have some words of advice and reassure me that we did do the correct thing.