Chicken wire does NOTHING against predators. It keeps the birds in but it’s not going to get in the way of any other animal. Replace it with Hardwire cloth.They are Japanese quail by the way...
Here is a video of them
The yellow one is the female that died and the brown one is the one that's still alive.
***There is a gap between the door because I didn't close the cage. It's not normally like that, I always make sure to close it before I go to bed.