Hi. I have 3 ISA Brown chickens and 1 Australorp. I had an ISA Brown previously who constantly roosted in the nesting box. That didn't bother me, because they layed in the other box, so there was no contamination. After she passed, I bought the 3 new ISA Brown chickens. Once I convinced them to roost in the hen house, they all moved into the nesting boxes. I heard that ISA Brown and other sex link chickens, because they are bred purely for laying, have forgotten how to roost, and therefore don't like sitting on a perch at night. I can't really build any other nesting boxes. I'm not that handy. I was considering filling the nesting box with sand and cleaning it out each day, although I don't always have the time each morning. Does anyone have any suggestions?