RE: flushing.....help!!
I agree with jashoffa. The whoa command is the tool I would use and a checkcord is a great way to ensure the situation is controlled by you. Take a friend with you and you need to leave the gun for a trip or two. Congrats on finding 6 coveys! Work those coveys again with your friend as the shooter and you as the handler. Work on that WHOA command and don't shoot the flushed birds, Mark a single and go after it if your dog flushes the covey. Don't get carried away with the singles though, best leave some for seed.