I wonder if it could be gape worms? Google Gape worms and see if that is what is happening to your roo.

Take a look at my chicken info site in the 'Health' section, here:

http://jackshenhouse.com/VSChickHealth.htm

Scroll down to 'Worming/Dusting/ and read what it says about Gapeworm, and see if the symptoms fit your bird. Also, grab him and pry open his beak and take a look inside for any unusual growths in his mouth or throat.

Any other symptoms, like not eating or drinking, weight loss or weird poops?

If you see or suspect any illness, treat him ASAP!

Velvet ~:>