I want to free range my chooks in various areas of the yard which already have 3 foot dog wire fences. I don't want the chooks to bolt and it is possible with full wings they could get a flap on into the next property as there are some banks not too far from the outside fence. Is it a normal/appropriate practice to clip wings and if so is it normal to do just 1. Also while I'm at it - the egg shells of my chooks are very weak at present. Is shell grit still the go for this. Thanks for comments.