We've had chickens for over a year now and to me, the number one aspect you need to be aware of is the dreaded Red Mite, which can kill a chicken and very nearly killed one of ours last year. Apparently, Red Mite can live on humans and other pets, as well as live in your house, so they are definitely not to be taken lightly. Get yourself a puffer tub of Diatomaceous Earth ready for when the mites show up - we dust our chickens regularly and mix it in with their dust bath. Don't put roofing felt on the roof of your coop as you'll only have to take it back off when you do get Red Mite.
Read up on everything you need to know to keep your chickens healthy and happy before you get them. There are some great sites and books (Haynes Chicken Manual) out there which have all the information you need.
For bedding we use Hemp, scented with eucalyptus, from a site called Flyte So Fancy. We've tried a few different things and found that to be the best.
Mr Fox can also be a danger to your birds, luckily we've never seen a fox in this area but we always keep an eye out for them. We have two dogs so hopefully their scent will deter any foxes that are about from coming in the garden.
We have an IP camera inside our coop so we can keep an eye on them to make sure they are safe as well as watch the various antics they get up to, which is highly amusing.
When the birds are establishing the pecking order it can look quite brutal but there are things you can do to limit any excessive abuse and also treat any comb or wattle wounds. We recently introduced a new bird and the other birds just seemed to hound her non-stop. We had to remove her from the coop and keep her indoors in a cage and gradually get the others use to her. That took a good four weeks or so but finally the other birds got used to seeing her and they leave her alone now, most of the time anyway.
Happy, healthy chickens lay the best eggs and everyone who has had some of our eggs say they are easily the best eggs they have ever tasted.
We love keeping chickens but it is definitely hard work sometimes.