Hello, we have a chicken who is a lone survivor from Marek’s disease wiping out the rest of our flock who won’t sleep on the roost. She sleeps in the nesting box, holds her pop all night, then in the morning takes one big dump outside the hen house. Some of the poo looks half processed. I’m guessing this is due to her holding it in all night? We’re either gonna give her away to a flock that has survived Marek’s, or bring in chickens that has been vaccinated at some point. But until then, how do we get her to sleep back on the roost?