I don't really do much maintenance for my birds, I don't even feed and water them anymore. My birds are free range 24/7, I clean out there nesting boxes on a needed bases, seems every 3-4 weeks I dump there shavings and replace with new or if a egg gets cracked, it instantly gets cleaned out.
I started out keeping them locked up in there 11x22 coop (stalls in the barn converted to a coop), then I opened them up to the other stalls 11x24, then I let them free range and this spring I started giving them less water and feed per week to where I am now.
They travel about 30 yards to a creek for water and eat all the grass, bugs and corn left over from the cattle (both mine and my neighbors (10 head total)), there crops are always full and they are fat and happy birds, I see no reason to supplement them feed now.
They have been 24/7 free ranging about 7 months now and out of 28 birds, I believe I have lost 3 in that time. I saw a fox after my hens last week, the cattle chased the fox and after my last count I don't think I lost any, a big maybe on 1 loss.
I noticed that my hens only free range around the cattle in the pasture but I never knew why until I saw the fox and it was clear.
As for cleaning the coop, I do a deep bedding method, I add more bedding once or twice a month and clean out the coop usually once a year, in the fall I collect the leaves I cut up on my lawn and use that as bedding, it works great, besides that I use pine shavings and very rarely straw, I'm not a fan of straw for bedding.
I have 3 feral cats hanging out around the barn, I feed them canned food once in a blue moon and have 25 chickens back there eating all the mice and different critters they can find, I'm happy at the ecosystem back there.
Only thing I have in excess is squirrels (grays and 3 albinos) and groundhogs that I have been trying to kill for 2 years lol, I can't/ won't use a rifle where I'm at, too much liability. Live traps and pellet guns on the ground hogs.
In the last 3 years I have trapped one possum and 2 raccoons, I have seen birds of prey in the area but they just travel and never go after my chickens. I have chased a skunk out of the coop 3 or 4 times in the past year, it's never bothered me, it just waddles out the door and disappears, it goes in the coop at night and sucks eggs that were laid on the ground instead of the nesting boxes. I don't mind the skunk, it won't hurt my hens and they eat bugs and other things, they're good to have around, my dog has a wireless electric fence so he never goes back to the barn or try's to chase animals like skunks, I have only seen the skunk up by the house twice, he traveled down my driveway to the barn area.
I carefully manage the ecosystem on my property, I will take out what I don't want and encourage a variety of wildlife. Grey squirrels have had a population boom around my place, they are running in my yard and trees all day long, so far they aren't bothering anything so I leave them alone, quite a few of the locals feed the albinos and think there neat to have around, more than likely they feed the same squirrels that live or travel on my property, another reason I leave them around, lots of people in my area (I admit myself included) enjoy them. Nobody in my area that I have talked to have had a nuisance story on them. I did throw one in the freezer last fall.