After reading every message in this thread, I decided to restart Alf's recall training as it'd got really sloppy. Too much abuse of the word 'come' has definitely weakened it.
I restarted yesterday using 'here' instead. Yes, I know I should probably have chosen a more obscure word but I just know I'd forget the word because it wouldn't feel natural to use. Nobody else, other than my daughter, is allowed to have Alf off lead outside, though, and at home I shall just tell people to NOT call him - that's MY job. If they really MUST call him in the house, then they can use some other method of getting his attention. His name will no doubt work because he loves visitors and whenever he hears them use his name, his there, right in front of them within seconds.
Anyway, I started by 'loading' him with the new cue. Here/treat - here/treat - over and over. Once he'd got that 'here' meant a treat was on its way (just like click means), I started holding one finger downwards, which he already knows is the cue for him to come and bump my finger with his nose. He quickly put two and two together and realised that the word 'here' means come and bump my finger (I have always asked my dogs to bump my finger after a recall if my finger's pointing downwards, otherwise just being within a yard of me is enough). After putting two and two together, he decided to start moving further away, then sitting and staring at me so that I'd call him to bump my finger and he'd get a treat. By the end of the evening he was sitting/standing on the other side of the room, staring at me, waiting.
According to the information that was originally posted here about this recall method, we're moving forward too quickly, so what I want to know is should I call Alf to me when he's sat across the room, or should I stick with just a few feet away? I'm concerned that if I don't recall him from where he clearly wants to be recalled that he'll start believing that 'here' only applies when he's already close to me. From the moment he 'got it' yesterday until we went to bed, he recalled every single time I used the new cue.