I have been working with Abby using a spring loaded pinch collar I got from my friend Kent Forbush at Snow Canyon Outfitters. It is a studded leather training collar with a length of metal banding sown in to help the collar spring back to the open position. I have been impressed with the effectiveness of the design. The dog only feels pressure when you pull against the collar. When she does what she is supposed to the collar springs open and Abby feels nothing. It has worked great for training heal and whoa commands. I have also been using it to reinforce the come command, especially when there are distractions. Abby is coming along nicely despite spending another 21 days in lock-down after her heat cycle returned a few months too early.