There are definitely indicators that dogs live here -- like bowls and beds and toys galore -- but I hope the doggie smell isn't one of them! I don't think my pups are stinkers, but they do get baths regularly and all of their belongings get washed.
I notice the doggie smell in people's homes much more when they have big dogs. I don't think my apartment has a doggie smell, but maybe I'm immune.
I think someone (friends, family) would have commented on it before.