However here is a question for you... what about pets? Dogs or cats?
Nah, I make them take their shoes off too. (JK, I don't actually have pets)

Until I moved to Nth Queensland I had never really encountered a no-shoes inside house (lived in Melbourne the Sydney all of my life prior to that), although it was common to take shoes off when it was raining. Up here, no-one seems to wear shoes inside. I often take my shoes off inside for comfort though, and definitely if they are not clean.