Wrapping up street photography...

I was doing a shoot at a cafe two days ago when this cute puppy walked by. Since today and tomorrow are pretty much filled with birthday activities for my daughter (now 4), I guess this will be my last street photo of the month.

For me, street photography is a favorite and I'm sure we will revisit it in one form or another in months to come. In fact, next month's theme is perfectly compatible with street photography (or portraiture or many other categories...). There is a very subtle hint in the photo above. And I mean, subtle as in "What the —? I'm not seeing it. That was the best example you could find?" That kind of subtle.

Any guesses?

I promise it's not pet photography.