How many Linear feet of Roost do they have?There are 12 chickens they are smokey pearls they have been on the same diet layerd pellet feed dumor brand there coop is 12x24 foot coop. they have runs and toys to play with. it was just weird that they were fine the day before when I was feeding and watering them then the next day I went down there and 8 out of 12 were bleeding when they raised their tail almost looked like I could see something maybe an egg? also my chickens are white how do I check for lice/mites?