Hello, recently adopted 3 hens

HI everyone!
I adopted 3 hen, a Plymouth Rock, Easter Egger and a Brahma. Here is the history on the gals. They are in their 3rd year. Landlord had 12 chickens, then he moved out of state and left the chickens in the care of family. The girls were free roaming, for a while they got feed, but after a year they were left to fend for themselves. I was giving them what seed our parrot wouldn't eat. 3 months ago there were 5 left. The son's young dog, killed 1 when the landlord was back. She kept going after the girls. He left for a week and another girl was killed. I stopped her from killing the Brahma and the Plymouth.
The next week our diabetic blind dog passed away. Landlord came back. He asked me if I wantediluvian the 3 girls. If not he would cull them, if the dog didn't get them first. Well being I just couldn't stand the thought of them being culled because they were unwanted. Talked to husband and he said if you want them do it. So I adopted the girls.
I was researching questions I had when I came upon this site. Such good information. Been through the molting and the EE and Plymouth have started laying again. Brahma has gone into her slow season. What fun this past 6 weeks have been. They look real good now. They get scratch and cracked corn in the morning, have laying pellets available at all times, fresh water (something the didn't have, were drinking what water they could find). They come running when they see me and talk to me.
They adjusted to the run quickly. They have a 9 by 13 run, coop with large nesting box on outside of run and a second large nesting box. Using shaved pine in coop and nesting boxes, have put a string of LED White Christmas lights on the roof of the coop on a timer. Comes on at 4:30am off at 7:00 am, the on again at 7:00 pm and off at 9:00 pm. They are no longer scared of our dogs (have 3 Chihuahuas). Hens are bigger than the dogs...lol.
I know this is long, wanted to give the history of how I came to have the girls. Thank You for all the useful information, it has helped me tremendously. Never have had chickens or even held a chicken. Having inside birds (parrot and a cockatiel) did help in knowing how to make a bird feel safe when holding.