Rooster has an unfamiliar appendage

[TheIncredibleEpi]

One of our neighbors roosters that we were watching has what appears to be a small toe growing on his abdomen. He didnt really react when I touched it, and he seems healthy otherwise. Any idea what this is?

 

[nuthatched]

Can you get a better picture if possible?

 

[Birdsong 82]

Whoa. I just ran across this an obviously made me very curious. Please please an update.