feathers sticking out

Hi all, My pigeon Philly recently lost his wife, and I've been paying especially close attention to him to make sure that he's OK. I've had him for 8 years and he didn't seem like a baby when I got him, so he does seem to be a senior bird. I just noticed that some of the feathers on Philly's...

I've been feeding pigeons on my balcony for about 6 months and during this time, Pigeons I was close with made a home, but eventually got kicked out by a bird named Scarface. I named this bird Scarface because not only did he kick the birds out, he fights with all other birds, I'm talking about...

my bird has a few feathers sticking out under its neck its only 3 or 4 feathers has anyone ever seen this in homers is it called a zipper?