Please don't jump on me for this suggestion XD
Anyways, I was thinking of just having different kinds of backgrounds for our pets...not clothes or dressing them up or anything, just different backgrounds to put on them. I thought it'd be a fun way to add some personality to your pet, but still keeping them beautiful and natural (by which I mean no clothes) at the same time.
What do you think?

I don't think this would work, based on the fact that the pets are just images and not fancy layers like the wardrobe (is it flash? really idk)
You can always add backgrounds with overlays. I really don't think this is necessary as a site feature.
[sub]Edited because sometimes I fail at typing.[/sub]
that's the point of overlays. You can add whatever you like to your pet c: