I’m no professional but our Rhode Island Reds use to crazy for a little spaghetti once and a while but I’ll post some more realistic quality of life improvements that can lead to happy birds.
-Sunlight: it keeps the birds happy and happy birds lay more eggs
-Roost(s): I’ve had birds that preferred sleeping in nesting boxes (Silkies) and Leghorns that prefer roosting at night. Having a large roost or one that staggers is a nice sleeping area.
-Replacing the hay for the nesting boxes a little more frequently when cleaning the coop.
-Kitchen Scraps: I’m serious about the pasta if you have some kitchen leftovers and take care of what scraps to feed they will be ecstatic
-Heat lamp: It depends on the bird but if it gets below 40F a small heat lamp can do wonders for nighttime
I like the cement blocks, we use to put some smaller perches around outside and sometimes they’d get adventurous and try to walk them.