When picking up medication for my cat at the local petsmart, my poor cabin fevered brain fell in love with a pair of parakeets. We have a loud and well lit house, we are NOT early risers, and I'm super crafty so I'd like to make the birds a cage cover. I have leftover fabric from shortening some room darkening curtains. It's very smooth and unlikely to fray and definitely works as a light blocker. Would this be ok to use or would air flow be a problem?