I have 4 raised garden beds that I want to use to "pasture" my chickens so they can wander about eating bugs and plants during the day but also be protected by fencing from cats that wander about. It will be enough room when they are young, but when they are full sized, I assume I will need to split my flock of 8 into two groups (the garden beds are 36 sq ft each). Will this create a problem when they are reunited in the coop in the evening?