Women.

And also, that kinda looks photoshopped to me.

Around the edges, there are some bits which aren’t quite pink, and are more white/gray.

img156.imageshack.us/img156/8981/pinkdogfs1.jpg

And Ben1605, your way off.

I’ve circled the real white areas. Those could just be wear the sun is sort of reflecting off it. I hardly think someone would miss that much if it was a photoshop. I’m betting they just brushed over the dog with pink, then changed the blending mode to colour. And since the dog was originally gray or white, the colour didn’t lay over that very well in parts, so it is only extremely slightly pink.

Those white bits also just look like where the sun is brightest on the dog, if you get what I mean