
I got four ex batts just a few months ago, my pure breeds look like dinosaurs next to them !
I don't think I'd go back to pure breeds now, the " wee broonies " as I call them, are much friendlier.
I keep mine free range, and it's been hilarious watching them discover the joys of being free and learning all the good things to eat in the garden.
You can get a specific ex batt food, which helps them recover quicker, regrowing feathers takes a lot of energy, so they do need a bit extra. You'll find they are particularly keen on calcium, I use a calcium powder and coat their evening scattering of corn and their pellets with it rather than using the ex batt food, as not everywhere stocks it.
I coat the feed in veg oil, then a few scoops of calcium and give it a good mix, the oil means the powder sticks to the feed, rather than dropping to the bottom of the feeder.
If you haven't already done it, they will need worming, Flubenvet is the best and the only one recommended by vets.