If this is your first time keeping chickens and you get ex batts, be prepared for sadness!!
It's a lovely thing to do, we used to have 75, but sometimes one will die the day after you bring them home, some can last for another 2-4 years! But don't get them if you want lots of eggs. When we had ours, after about 6 months, the 75 were only giving us about 6 eggs a day!
It's a wonderful feeling though when you let them out for the first time, mind you, some of them won't come out for a day or so, but it is wonderful to watch them look at their feet on teh grass, or look up sideways at the sky because they've never seen grass or the sky before!!!!
they look so scraggy, but after just a few weeks their new feathers start to grow adn they turn into chickens again!!!!
Sometimes they'll lay you an egg on the way home!!!
Good luck!!!