A different thought......
I had a group of birds that got spooked by a fox checking the perimeter of the run. I couldn't find one bird. I looked for an hour for any sign of her.
I found her alive and rather stuck under the nest boxes only because her buddy kept looking under them. Only the ends of my boxes had a gap. The front had a 2x6 on edge to hold it up. Lucky for my girl they were not screwed to the wall.
There were several areas the Fox had tried to dig under to get in the run.
What I am saying is extreme fright could have caused them to hide there.
I had a group of birds that got spooked by a fox checking the perimeter of the run. I couldn't find one bird. I looked for an hour for any sign of her.
I found her alive and rather stuck under the nest boxes only because her buddy kept looking under them. Only the ends of my boxes had a gap. The front had a 2x6 on edge to hold it up. Lucky for my girl they were not screwed to the wall.
There were several areas the Fox had tried to dig under to get in the run.
What I am saying is extreme fright could have caused them to hide there.