Wow have you seen this in Richmond and if so where? I've only dealt with the bylaw officer for my area and he is super chill lol.
We've had unlicensed dogs, they just send letters with threats of fines, but we've never been fined (we pushed it a bit but they're licensed now so I don't know the breaking point). And it took them a loonng time to realize it. Which is funny because their records would've shown the licenses had been expired for years.
Also, re:Langley... I dunno, I would hate to give you bad advice but I REALLY don't see them enforcing that law much. If I were you I wouldn't worry with 3 well cared for dogs. It seems silly to even have a law like that in Langley. Maybe it doesn't apply to ALR zoned properties?