Feed them McDonald french fries...
I wouldn't want to see super-sized seagulls divebombing window washers!
What you want to feed them are a few Alka-Selzers.
They can't burp. You'll see red from their exploded crop in an hour.
I had my own run-ins with the critters at Presidio of Monterey doing repairs to a clinic. These are the most hateful creatures in the world once they are after you. I required stitches on my temple due to an attack. Happy to see them dead.