Chickens in my flock are becoming sick please help

[bravofarm]

Help me i have soez sestear eggers red island red. Them have just started to look sick. Two have started to become realy lazy and have ate veary littlie. I have tried feeding them but they always leave and nay down and dont even go whit my other chickens can someone please helpHelp me

 

[Gargoyle]

Could you describe the symptoms in more detail? Are their combs pale or normal color? Are the having trouble breathing? What is their poop like, has it changed, or perhaps are they constipated? If you look under the feathers, any sign of mites? Any other details you can give might help someone figure out the problem.

 

[bravofarm]

One of them has a pail cob and sometimes it locos like it might trowup and the other one seems like it has had no sleep and they dont eat much