I'm thinking of buying a 10x10x6 kennel, and build a coupe off one end. It will be home for 8-10 silkies. My biggest concern is keeping flying predators out. What kind of material would be good to cover the top? I've seen the A-roof kits you can buy for these kennels, but they are covered by a tarp, and a tarp doesn't last long whey exposed to the elements. What do you recommend.