Don't panic when I say this, but the main disease you see blood with like that is ILT, which is Infectious Laryngotracheitis, but I dont know that the other symtoms fit that. They wipe their beaks on their feathers and get blood splatters on roosts, walls, etc. Hopefully, someone who has had this in their flock can comment on those other symptoms. Doesn't seem to me the other symptoms fit exactly and that would be a good thing because ILT is a nasty disease.