How do I reclaim my balcony from the pigeons?

Homies, I need your help: pigeons won't leave my 12th-floor balcony alone. After putting up with two rounds of pigeon babies being born and raised because I had a heart or something, enough is enough. My cat chirps at them, and if they see her, they fly away — but then they come right back. I bought a plastic owl with a rotating head, but unless I move it around the balcony every day, they get wise to it and ignore it. Am I doomed to this owl-repositioning fate forever? Or are there other options?
Help! There's so much poop!


This app may help me get over my fear of buying perishables

There is an app that now exists that helps you keeps track of your perishable food. It's called The Fridge, and I think it's going to help me get over my fear of buying perishable food. Since I'm so unfamiliar with "real food" that I don't really know how long I have to use anything, I just end up saying "nope, nope, nope" to foods with a time limit.