sorry I can't find the original post...the story with the fire and finding a dead dog and Johnny with PTSD could it be Lost and Found by Jill Hargan on
http://audreys-efanfic.freeservers.com/ ... found.html
It's on Audrey's site Guess Dispatcher's.
I just finished re-reading Lost and Found by Jill and it's about Johnny recovering from being kidnapped. There is nothing about a dead dog. It is great story anyway and has a sequel, Reclamation.