I have a 6+ month old Silkie hen that has been kind of sneezing the past few days. I have been reading some threads about how chickens sometimes have breathing problems with head and humidity. I live in North Central Florida and my typical daily temperatures in my coop (with 2 fans have been in the upper 80s to low 90s. I do not mist spray water in the coops at all. When this hen sneezes, it kind of sounds like a cluck. She drinks and eats normally and otherwise seems fine...eyes are clear with no discharge, no nasal discharge, etc. All other chickens seems normal (all but one of my other chickens like to leave the coop during the day and free-range). This hen, as long as I have had her, has always seemed a little slow. I have a special needs human child, so trust me when I say that I can make the comparison in how the hen behaves compared to my human child. I can just tell. Not that she is necessarily mentally retarded, but just that something isn't quite right. She's not a "typical" chicken. Sure, she eats, drinks, scratches sometimes, and clucks when she hears another chicken cluck, but she doesn't interact with the other chickens. I have another Silkie hen that is about 2 months younger that is so attached to this hen that when I separate the two, the younger hen cries. Any ideas as to what might be ailing the sneezing hen (allergies, cold, heat-induced issues)? Should I give her some supplements of some sort?