Thanks so much for the info... Good stuff! I will take it slow on the free range with them and let them out supervised at first. Can't wait to show them their new home Saturday!Our lean-to's are not fancy but protective. A long plank of flat board 6 to 8 feet long by 1-1/2 to 2 feet wide. Hardware stores will cut a 4x8 plywood panel in half for you giving you two shelters. We prop the plywood plank on cinder blocks positioned under each end of the plank. We use 2 stacked cinderblocks at one end and 2 stacked cinderblocks at the other end - or 6 square stepping stones per side. That's all. 2 or 3 of these go around the perimeter of the yard and/or against a building where chickens seem to like to gather for their afternoon snoozes. We had a leftover long plank of closet shelving that we salvaged and a small damaged bookshelf to use as shelters. We have a lot of wind so to keep the planks from sailing off the cinderblock bases we anchor with a brick or stepping stone at each top end of the plank (so the stones/bricks don't sag the plank in the middle). Of course we have a recycled dog house from the thrift store that was still in great condition that our Silkies like to hang out in - I'm looking at 4 chickens right now using one of the shelters and the dog house (afternoon siesta LOL). I plan to set up a large shelter in the middle of the open section of yard for them also - this one will have to be a bit more decorative being center view. Chickens will always cruise the yard not just to forage but they're checking out good future hiding places and bushes at the same time. The key is to have several scattered hiding areas around the yard. They will use low benches and tables for hiding too if they are positioned up against a wall, fence, or row of plants. My girls liked to snooze under a large stickery climbing rose bush that finally died after 25 years. I'll have to get another one after I figure where to plant it.
To keep mine out of the garden beds I use a 50' roll of 2 feet high green rabbit fencing to keep them out of digging there. A couple times when new they tried to fly into the area but I promptly but gently showed them out of the area and they respect the barrier now even though they can easily fly back in. You may want to use a 3 feet or 4 feet tall rabbit fencing to keep your birds from going way back into the property and just contain them within your view. To secure the fencing there are green stakes that will anchor the fencing and easily remove if you need to move the fence later.
As for dogs we decided not to invest in one. The hens are so adept at keeping themselves hidden in the free-range backyard for 3 years that we didn't find it necessary. Too expensive for vet bills, yearly licensing & vaccinations, training, food, housing, etc. Anyway, our spooky kooky Ameraucana is our barnyard alert and she chases stray cats out of the yard. She used to chase the wild birds too but has come to accept them as ok. We have a wildbird feeder that the Cooper's Hawk likes to frequent for easier prey than our chickens. We don't hatch chicks so there is no temptation for little chickie prey.
For dogs it's best to introduce puppies to chickens rather than the other way around. From puppies it is much easier to keep them around poultry and accept the birds as part of the "pack". Unless a particularly clever adult dog is easily trained they usually eye the birds as something to chase or down for sport. Stress is not good for laying hens or any hens for that matter LOL My friend has an incredibly intelligent little purebred dog that is protective of the flock but one incredibly stupid mixed breed that wants to dig into the chicken pen. I gently warned her that one day she will come outside to find her laying flock scared, injured, or dead but it's up to her to choose her action. You can't take unruly children to a dog pound but you can always send a dog back to one - sounds harsh? Not when the peace of my household is at stake - people re-home unruly bully chickens so why not re-home an unruly dog? As one wonderful BYCer said - read, read, read, research, research, research to gain knowledge about chicken behavior, housing, health, feed, treats, etc. I'm sure there is some info on training adult dogs around chickens as well. My daughter had to finally re-home an unruly shepherd mix after 6 months of expensive training in the $1000's - just one of many reasons I'm not a fan of mixed breeds. With purebreeds you can almost count on specific traits where it's not so easy with a mixed breed. That goes with chickens for me too. These are just my preferences and I'm sure there are many that will agree as much as disagree LOL.
Wow didn't mean to write a novel. Good luck with your girls! Chickens have been my most favorite pets up-to-date and we've had dogs, cats, budgies, cockatiels, parrots, ducks, geese, goats, cattle, horses, sheep, tortoises, and even a boa snake! Never had rodents like rabbits, guineas, rats or mice so can't speak about them.
Cheers!