no need to be so adversarial I am well aware there is definitely more than one way to train a dog, I simply offered a proven method that doesn't require force.
Most hunters won't follow through a FF routine, especially on a resistant dog, so I like to offer an alternative that they can feel good doing.
to answer the questions from above
the problem is not getting the dog to hold, he's already holding, he is refusing to release if I read the OPs post correctly
the dogs already trained to a point that would indicate he knows sit, so he will sit
your left hand is firmly holding his collar so that is why he won't run off, infact that why this method works, young dogs always want to move on. You don't let him until he willingly gives.
I've been training labs and pointing dogs since the late 60s both personal dogs and for other folks. I quit training other folks dogs in the late 80s. I maintain a string of 8-12 personal dogs and have for the last 38 years or more. My point mentioning this is simply that i do have a lot of personal experience working with problem dogs and this is a common problem especially with pointing dogs.
The technique I offer above doesn't use treats or a clicker and it works well because the dog makes the connect that the release means he get to have more fun hunting. And it won't mess up a dog like someone that will not got through a FF routine.
It's slower and takes patience and it's pleasant and simple understand and to do, few people find force fetch training pleasant.
This technique is really more useful and aimed for upland type retrieve work where a dog wants to get back to the hunt, but this is a pheasant hunting site.
I was trying to be helpful.