Looks like the run isn't painted and has no overhead cover. What kind of predators do you have there and how many chickens have you lost?
Any lumber you can see that's not painted is salt treated.
The runs aren't covered, but the only times I've lost birds to predators (possums) have been when I forgot to close the door at night. I think I've lost about 6 over the last 4 years
I've never lost one to a hawk, although a hawk will occasionally get a pigeon when they are flying
Possums are my biggest threat since they are too stupid to pay a lot of attention to the dogs barking, although that same stupidity makes them very easy to trap
The chickens free range most of the time, and have lots of bushes and buildings to hide in.
I have 7 dogs, 5 of which are Maremma LGD's and most of the yard is bordered with electric fence for my pastures, so it's RARE that anything gets into the yard without my knowing it
We have many types of predators, but my Maremmas are always on guard,
HIGHLY ALERT, and ready to defend my critters at a moments notice: