I personally don't care what other people think. When raising three daughters I got comments about how they were dressed too.( I loved to dress then all alike) It is not an age thing as in my twenties and now in my fifties I say the same thing " Is it a slow day for you and are you looking for people to be rude too? That gets them every time.
I have had people say " You have too many dogs" or "poor things don't they hate getting dressed?"
I have as many as I want and can afford and they are my kids not a fashion statement. My dogs also love to get dressed to go Bye Bye.
I think people can just be plain rude when it comes to dogs and kids sometimes.