Nipper came to me to stay for a couple of months a number of years ago and during that time I did a little bit of work on his loading issues. He had apparently always been a little tricky to load, so I decided to get my clicker out and do a little with him. This video shows his progress in just one session, and following this he was able to be successfully easily loaded and travelled back to his owner's place. I work with the leadrope on but loose and just click him for steps towards the trailer. This was probably about ten years ago and nowadays I tend to focus more on using a target or my magic bucket trick, however back then I had had some success using this approach so it was the first thing I tried with him. I think in the long term it can be very effective but you have to be very careful to shape your demands so that the focus becomes walking fully into the trailer, rather than stopping and starting on the ramp. I don't tend to recommend this to clients because I find they are more inclined to end up with a horse that teaches them to 'dance' forwards and backwards on the ramp for rewards! I find the same thing often happens with a hand held target, hence my preference for stationary targets or buckets these days, I find clients with less training experience tend to do better with them!