My experience with turkeys with clipped wings is that it does not stop them from easily jumping up 6' in the air. The other thing with turkeys and clipped wings, one time usually does the trick. By the time the flight feathers grow back, they have usually forgotten how to fly.
Guineas with...
Most people that have those issues treat their poultry as pets and give them treats in those areas. Then they wonder why the poultry is always hanging around in those areas. Anywhere the poultry congregate will be where lots of droppings are found.
I don't treat any of my poultry as pets and...
It all depends on the hidden recessive genes. You should get all Pearl Grays unless your Pearl Gray male is carrying hidden recessive genes. Once the offspring start producing, you could get a lot of different varieties such as the Lavender, Royal Purple, Bronze, etc.