Middle is a great game for dogs. It can often be used as a party trick or after a recall.
Having a treat in both hands, use one hand to lure you dog around one leg and use the other hand to lure them in-between your legs. Once your dog is in this position, say "yes" and give them the treat. Repeat this several times. However, if you prefer your dog to be in a sitting position in between your legs rather than standing, you can lure them into a sit once you have managed to lure them in between your leg' s, say "yes" and give them a treat.
Say the cue word such as, ‘middle’ and then complete the action of luring your dog into the position. Again, repetition is key.
Here you can start to fade out lure to see if your dog has understood the cue word. However, remember the rule of three. If you have attempted the behaviour a maximum of three times and your dog still hast got it, come back later to avoid frustration and start off with the cue and lure step .