My loft is 6X16, and I have three vents near the bottom of the rear. The outside vent is 5X14, and then the interior piece is angled for poop control, which has 3 1" holes drilled, with nylon netting glued to the back. The front door has a slideup window, which is about 15X18" when open. Is this enough ventilation, or should I add more vents on the bottom. I have attached pics to see.