ya, Ive had bricks in front of the door but hey are always moved.
Hi, Im in Apollo and just lost 5 more chickens. - Page 2
At night birds will go into an almost trance-like state which makes them an easy target for predators. Having a bird fly in the dark can also cause nearly as much injury as having a predator get ahold of them.
Could you make a bar type latch that will secure the door better? Should be fairly easy to make from 2x4s and they can usually be had from pallets or people that are doing remodels near you.
Don't know what the proper name for a latch like that is but it's like was used on the old cabins and such before the modern locks.
Leaving the door open will only make it easier for the predator to get in. What kind of openings, besides the door, are there into the coop? What kind of damage is being done to the chickens?