I' ll support OHIODUCKHUNTER. First you learn. Then you teach. Then you use low stimulation to reinforce commands.

I bought Cabelas brand (one collar) which is TriTronics for about $150. I' ve used it for one duck season and It was great. It is important to have a range of stimulations so you can find the right one for your dogs. Mine has 15 and I train on 4. You also need to decide the range of distance you will need. For duck hunting the 300 yrd has always been enough for me. Good luck.