Originally Posted by adam1
i dont know but you could tell that they were younger than the others but all 15 have never been flown before as the last person to own them live in a busy city area so could not let them out
If you have had them for four weeks, they are probably well settled to your loft now. You can start flying them any time. Just make sure that you have trap trained them well prior to flying them, and don't feed them the day before you fly them. This should be your routine for the first few weeks of flying.