[nlh]

I'm going to give this a serious response even though I know you're referring to a well-known cliche for startup ideas.

I was talking to a fairly smart VC recently and he made a good point -- while everyone likes to use "Facebook for Cats" as a joke about bad startup ideas, it's not actually a bad idea.

A lot of people REALLY like their pets. And they spend a lot of money on them. And they like to share pictures of them with their pet-owning friends (go see /r/aww if you don't believe me.)

It basically hasn't been done right (yet), but I wouldn't be surprised if something that looks like Facebook for Pets does actually become a thing at some point.

[xauronx]

http://packlove.com/optimus-prime

This website gives customizeable one page profiles for your pets. Seems pretty heavily used, I signed up one time and I get emails every couple of days because another user "loved" my pet.

[dragonwriter]

Er, but doesn't regular Facebook fill this need for those interested?