Do you have Raccoons in your area? They kill everything that moves and may take just one or two to eat--and will carry them away. And Raccoon with young will kill during the day--and climb over the top ! We have foxes, and rarely see one during the day. EVERY night and on rainy wet days, all my birds are locked in their houses, windows may be open, but tightly hardware cloth screened, so can be open summer nights. Always a challenge to keep our dear birds safe. (I lost 23 to a Grizzly Bear sow and her 2 cubs, broke windows in one house and tore up the pens inside. Night time, but I have a motion light outside the houses and the birds flew out the broken windows and were killed and eaten all over the lawn outside. SAD AND HAVE NOT GOTTEN OVER THEIR LOSS. Never repaired the house, but the FWP bear man, came and electrified all the wired windows of my other 2 houses--from April to November (ON a night, OFF by day). And--I do not let my birds out in their fenced, netted over the top, pens, if I am not going to be at home all day! Better SAFE than SORRY!! My houses have large pens and roosts for day and shelves for nest boxes, with roosts over a higher shelf, for night time roosting--nice cedar shavings and waters and feeder up on locks to avoid the shavings being scratched in. Must be convenient for ME (old person) and also for my dear birds!!! Good luck.