Since I live in the country, people from town like dropping off their stray cats in my area causing a major influx of feral cats. One of the neighbors looks at them as barn cats, and feeds them in the winter. In the summer these same cats get at my chickens, the first year we lost 6 of our 7 laying hens, last year 3 cats died of lead poising and we only lost chicken due to a (hawk/owl). you have lead based paint on you chicken coop??