My girls have been laying since early Sept. and spend what I think is a LONG time in the nest box. I only have two hens, but it's like I need 2 nest boxes for them. They sit in there for hours. How much time does a hen generally spend in the nest box? Sometimes I have one in there for 2 hours and the other needs to "go" and stands out in front of the box and squawks at her. Is this normal? Do you make a second nest box?