I'm new to keeping chickens and have read a good bit about it but need some more advice. Have built a hen house myself and an enclosed run. The house is 4' by 4' and 3.5' tall. Run is enclosed and moveable and is 10' by 4'. Have 4 hens arriving on Saturday. I bought a 1.5ltr drinker and 1kg feeder. Where should I put them?? The neighbour has cats will they bother them? If I buy oyster shell how do I give it to the hens? I only built one nest box, is that enough? It's removeable and if I need to I could build a double one.