This is great, just put a tarp of sorts on top for the bird's above, Although it depends on what type of preditors you have..
Your in ARIZONA, Ok let me ask you, I used to live in Az but never had any chickens or ducks, got into that when I moved to OHIO about 11 years ago, now I know you guys have poision snakes, scorpions, poision frogs, and even those creapy eight legged spiders. YEK,
Ducks here will eat frogs, I know it's grose but I have seen mine do it. GRRR, do they bother those types of nasty creatures there? I always wonder if a duck knows not to mess with certain creature because they instinctively know they are no good meals.. or rather snacks, Well NO meals because those Poisionous frogs are not a snack..
Right now our only problem are ant's!!! I have heard we have grey fox's not too far.. But that family ended up getting a dog so the family of fox's never returned.. No snakes, scorpions, poison frogs here. & yes to spiders.. I go out at night with a fly swatter and flash light.. I do about 6 properties all at once..I do not want any harsh chemicals.. We will use essential oils for most pest & the fly swatter.. Our dog's have taken out feral cat's, that thought it was safe to go into our back yard.. & actually loose dog's can be a problem.. I have been out at the driveway with a large shovel, staring at the dog owner.. I warn them if their dog enters our property.. Boy do they run to catch their loose dog..