Missing Dog

I think I might just look into how to adjust pet aging to match my sims aging. I play in rotation, and like the fact that sims will age while you aren't playing them. Similar to my Sims 3 game in that fashion. I also don't like to give my sims age "hacks", so hopefully editing the ages will work. :D

You might also try checking the "not in world" households....the dog may be in there. When I was testing giving up pets for adoption, I noticed a cat that I put up for adoption was in there with his own nameless household. So it's possible your dog got moved into there and, if so, you could merge the dog back into the household.