Great responses! Here's a few more I've learned in my first year of being a chicken mom...
Lots of people think corvids (magpies, crows & ravens) can harm their flock... but my sister and I have found that corvids will actually protect your flock from raptor birds! Raptors are scared of them, and the corvids see your chickens' extra scratch and scraps as a food source they want to protect, so they keep the hawks and eagles away.
Also I'm about to try hanging shiny objects around the chicken yard to keep hawks away, as well as bird netting over the top and maybe an owl decoy... in 100 years of my coop being there, it's never been covered and the previous owner who lived here since 1963 said they never lost a chicken to a hawk. But I had a wee chickie get snatched the other day (ravens and magpies can only protect them while they're around), and now that hawk keeps coming back, so I'm taking every precaution.
Coyotes are a problem here too, I lost 2 hens that way... I didn't know they can jump a 4' barbed wire fence reinforced with hog wire, but they sure did.

My husband shot at them with his 7 mag and scared them off, so far so good with the coyotes.
Mice are awful!!! Keep your coop super clean of spilled feed, store all feed in mouse-proof containers (new Rubbermaid trash cans with lids are cheap & work great), plug any holes rodents can get into with steel wool and caulk over it, and make sure to pick up eggs every evening when you close up your birds. Mice will get into the nesting boxes and eat the eggs! And they carry parasites like lice and other gross stuff, not to mention the bacteria in their feces. Once they establish your coop as a food source, they'll keep coming back, even if you live trap and relocate - the only way to get rid of them is to trap and kill them. Barn cats are also a great idea. Oh and we found out from the judge at the 4-H fair poultry show that mice will also nibble on your chickens' feathers while they roost... nasty lil critters!
Amen to not heating the coop! Heat lamps are the WORST, never ever use them... they're dangerous and super bad for your chooks. One of my worst rookie mistakes with this was when a couple of my older girls got egg yolk peritonitis from the constant light source, and one of them ended up with a frostbitten comb. Now I just use heated perches and heat pads that only kick on at freezing temps, to help prevent frostbite during the subzero nights (I'm in the Rockies at 8500ft, our winters are stupid cold and we get snow for 8-9 months).
A good first aid kit is a must! You never know what those silly birds are gonna do to themselves. Others have made great suggestions on what to stock, so I'll leave it at that.
Diatomaceous earth is my go-to for parasite control. I had to treat for lice, and that stuff works fast - I dusted the affected bird and in less than an hour all the lice had died and dropped off! Half of my coop is tube sand over concrete, and the other half has a dirt floor, I sprinkle DE in there so they can dust bathe in it even over winter. If you don't have a dirt floor, you can provide a box of dirt, sand & DE for dust bathing. Wood ash is also a good addition. Straw and wood shavings (never use cedar) can harbor parasites, so dust with DE and make sure to change it out regularly. Lice and scaly leg mites really suck, the best offense is a good defense!
I've really enjoyed my chickens, they're so funny to watch and their personalities are amazing. I can't wait for my pullets to start laying, and learn what happens when they go broody and hatch their own eggs! Such an adventure being a chicken mom... good luck to you!



