I think you could take him out for a week with no drop in fertility..Jim, this pen was just for 'fill in' eggs. I have one more breeder pen to set up with Brahmas and those are what I need to incubate for orders. The 'egg eater' pen is a project so I was just going to add those eggs to fill the incubator.
How many days do the hens stay fertile? Only 3? Maybe I can crate him at night and let him out after I collect eggs?
I like your idea of removing him each night, better..
who knows, ? maybe abstainance might break him..