You usually use food at the end of the beam ?? wouldnt mind hearing how that works ??
Pernod
Iv seen a few people do this, stick a bowl of food down the end of the garden and put the lamp on it, dog runs down the beam for the food, soon learns there's going to be something for them at the end of that beam.
Never heard of that before mate, I like a dog to retrieve and can't see how it could manage to do that with a bowl of food.
A better option would be a dummy or even a dead rabbit, do it on the same ground you do your retrieve training and the dog will soon realise