I used to raise goats so I decided rather than completely build I new coop I would convert the goat shed. The shed is built off of a fence so one of the walls as 1/4 inch gaps and a ledge near the bottom. The other three walls are completely solid. Do I need to cover the gaps or are they fine? Also, the roof is shingled but it tends to leak a bit creating some drips from the ceiling when it rains heavily. Will this be a problem for the chickens? Thank you!