They do allow her in the coop, to eat etc, they don't chase her so bad she is always hiding? If she is just the low chicken in the pecking order (there is always one), as long as you have multiple next boxes she should be OK, she may not be able to get in the "favorite" nest box, but she should be able to find one open. They usually recommend one nest box for every three or four hens, more boxes won't hurt. Hens like to use the same nest boxes other hens do (one reason to use fake eggs, so they think that another hen already thought that was a "good" spot), so it is normal to find a line of hens waiting to lay or even more than one hen in a favorite box occasionally.
