I tried to find long funnels for bottling my kombucha, so it wouldn't foam over the top of the bottle. I figured beer brewers would have something. I googled "Beer long necked funnel" and got nothing but bongs.This is a very interesting question. I just tried to Google the question and got lots of info about crack cocaine and how humans would rather eat high fructose corn additives than chicken. That's got to be the biggest Google fail I've ever experienced. We're on our own here
For OP: how about using BOSS (black oil sunflower seed) to get your birds out and about?