Thank for you that.it's called new cacastle disease
I assume you mean Newcastle?
Antibiotics can help with secondary infection, but there is no real treatment for Newcastle since it's a virus.
It's highly contagious, so if you have any other birds that are symptomatic, you may want to separate them or even think about culling them. I'm sorry and don't mean to sound harsh. The disease can spread rapidly and affect your other birds.
You don't want to sell or give away any of your chickens since they will be carriers of the disease for life even if they recover.