I would put it together with as much run as possible. Then I would make sure to have a week test run with the water and food. If the food doesn't fail and your water is FOOL proof, you are fine. If eggs build up it's no the end of the world.
Your hens should be 7 months +. Older hens know what to do. A week of confinement in a smaller run with adequate supplies so as not to cause food aggression is fine. 400 sq ft for a week, with access to larger ground the rest of the year will suffice.
15 birds is totally manageable. If you can I would have someone check in on them 1/2 through to check the water. No water will kill your hens.
I Thinking ahead is wise. You don't want to be trapped by beloved pets.
Your hens should be 7 months +. Older hens know what to do. A week of confinement in a smaller run with adequate supplies so as not to cause food aggression is fine. 400 sq ft for a week, with access to larger ground the rest of the year will suffice.
15 birds is totally manageable. If you can I would have someone check in on them 1/2 through to check the water. No water will kill your hens.
I Thinking ahead is wise. You don't want to be trapped by beloved pets.