Thanks for the warm welcome - Ok more info -
My hens get ponodora premium which is the high end layer feed here - for every bag of feed i add a small bag of oyster shell and a small bag of vitamins and minerals - I dont have usa branded atuff here in Costa Rica - but this is an agricultural culture and many things come by reccommendation from the dude at the feed store
- they get table scraps maybe 3x a week and twice a month I give them some cans of tuna.
- they have a large area to free range during the day and they get lots of grass bugs greens and ive seen then eat frogs and small snakes even!
Please see the attached pics of all my girls this first one is the chicken in question with the scaly patch on her back - I couldnt find any lice or mites and the second picture is the best i could get of the skin area where theres a crusty patch - the skin underneath looks normal
- it is rainy season - my coop is at the bottom of a hill but its raised 3 feet off the ground and there is adequate drainage - the yard gets muddy but it drains or soaks in ...
- the coop is new - just rebuilt it - it has 2 one inch wide open slots in the floor to allow air through the bottom and to drain water out as i rinse it everyday.
- i have 2 nest boxes with sawdust and wood chips
I dont use litter on the floor because they spend all day outside - they go in to roost at night
- the coop walls are wire fencing lined w 1 inch chicken wire wrapped with landscape fabric and ive left the bottom 2 inches unwrapped by the floor to push water out the sides
- this design has veen very successful at keeping all the critters out.
Im wondering if anyone has seen the scaly back issue and what I can do about that as the hen is otherwise happy and seems very healthy. I think shes broody tho shes picked out her bottom breast feathers but she otherwise fine.
I have nonidea what breeds my hens are

would love to know if anyone knows that as well - mainly concerned about my hens oddly scaley back