Wing-clipping and run fence height.

Well Paul it's one of those questions like.... How long is a piece of string...? Clipping a birds wing, note the singular, is to misbalance any jump/flapping of he bird over a fence. However a hen can still do it even though her wing has been clipped but is just less likely to as she will be off balance. You can get the canny hen that can compensate for the difference in her balance. Some people prefer not to clip a wing so the hen can have a bit of a heads up against predators by getting herself up into a tree etc. The feathers you clip will have no feeling. I would agree that the breeder doing it for you the first time and showing you at the same time in an excellent idea. It is very easy once you see how. The only time your birds will have any feeling in their feathers is when they are 'in blood' which is when the feather is very new and engorged with blood. They look like little spines making a fully moulting bird look like a porcupine. It might be a good idea to roof the pen if possible but make sure it's high enough for you to stand up right or you will curse it forever more when you need to catch a bird or do maintenance inside the run.

OL

I didn't need to clip my original 3 girl's wings but the new girls were very flighty so I looked up instructions and diagrams on the internet. It was very easy to do and did help keep them a bit closer to the ground, but if they can get a leg up onto something they will still try to get over the fence!
Your run should have a roof to make it predator proof, so yes, make it high enough to stand in, it will save you a lot of backache.

I agree with sneezer, mine have never had their wings clipped and show no interest in flying. as long as there is enough to keep them interested then it should not be a problem. as to fence height the I would make it 6ft high, unless it has a roof of course