User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-74.193.207.108-20120926203236/@comment-5043481-20121002203951

Milk? from a pigeon? Surely not. Where does it come from? would it not go all over the feathers and make a mess?

I know seabirds vomit up food into thier chicks mouths to feed them, I think this is more likely. Some seagulls have a big red spot on thier beak that acts as a 'vomit button' for the chicks. Press the button and mum is sick in your mouth. Yuk.