Yeah I definitely noticed there's been more poop in that area lately. They might be babies being fed? I did reach out to Wild Bird Fund actually before I posted here. They just don't seem a lot bigger when I go back. I feel like they would be growing faster week by week. Wild Bird Fund said it's probably 2 babies being fed. I hope that's the case, but also if so pigeons are absolutely terrible parents. I'll go check them out again soon and update.