Ailments in chickens vary so greatly that it's not really possible to diagnose him without more details. There are lots of resources on the internet that will help you diagnose him, and when you do, you can either try to treat him yourself or take him to a vet. Livestock vets generally don't charge as much as pet vets for a check up for a chicken.
A veterinarian.
yes
A rooster holding two rings.
Rhode Island Red. I have an Araucana rooster who's name is Alektorophobia (ALEK) and a bantam Barred Rock rooster named Checkers
To prevent a rooster from crowing early in the morning, you can try keeping the rooster in a dark and quiet environment until a later time, or consider using a rooster collar to reduce the volume of its crowing. Additionally, providing distractions such as toys or treats can help keep the rooster occupied and less likely to crow.
Chickens can be happy with or without a rooster. Roosters can provide protection for the flock and can help maintain order within the group. However, if a rooster is aggressive or stresses the hens, they may be happier without one.
The possessive form for the noun rooster is rooster's.
When they get the injections from a rooster's comb, the rooster does have to be killed. They can get rid of a rooster's comb without killing it but it has to be on the first day that it is born.
rooster
The plural of rooster is roosters.
A rooster crows.
Rooster