I need some help? I have a 7 month old YLM that is doing great pheasant & Duck Hunting except for one thing. The first couple of pheasant in the morning last week he just wanted to run to the end of the field. so of course being a young dog he kept following. he is cc and ff but with his drive in the morning and the smell of the birds took ahold of him there was nothing i could do to stop him from running 100-150 out to the end of the field till the birds flushed then he came back. I have worked him on crippled chukars and i can get him to stop whenever i want to. 10' , 2', 75 yards away from the chukar i can stop him. this was a different scenario that i have never seen from him before. i have always been able to whistle stop him or nik him with the collar at a 2 or 3 setting and that was all it took. I don't what else i can do to stop him except put him back on a lead. I do not want to use the collar at a high level so i don't make him dead to the collar. After the first field i was able to stop him every time. I this as simple as maybe throwing some bumpers to tire him out a little. He is the most active lab i ever have had. He comes from some field trial dogs.