Around the time we were writing ‘All Dogs Go to Heaven’,” executive producer Sera Gamble shares, “I was creeped out by my dog when I got out of the shower and he was just standing there.” Co-executive producer Adam Glass elaborates, “Sera kept saying she couldn’t look at her dog the same anymore, that she started to think to herself, 'Oh my God, what if my dog knows all my secrets? My dog sees everything – sees me naked, sees me when I’m sad…’ So we thought, 'Wow, what’s the best kind of monster to make but the monster that lives amongst you that you love?’ People trust animals, and on Supernatural you have to be careful who you trust.”
Executive producer Phil Sgriccia reveals that standards and practices kept a close eye on this episode for two reasons: “You can’t show naked guys and you can’t show dogs getting shot.
Knight, Nicholas. Supernatural: The Official Companion Season 6. Titan Books, 2011: 48, 50.