Reinforce with treats when your dog lies down naturally before adding in a verbal cue.
Natural Behavior
Hold a treat by your dog's nose then move it down towards the floor guiding them into a down. Reward once they lie down.
Use a Lure
Say "down!" each time you lure down then reward. Repeat until lying down becomes habitual when they hear the cue.
Introduce Cue
Slowly incorporate giving the verbal cue without showing the treat to transition off the lure.
Fade the Lure
Only give the reward if your dog completes the full down action after hearing the cue.
Require Lying Down
Over time, step away from your dog before cueing down to proof the behavior without proximity.
Increase Distance
Reward your dog for lying down on cue during walks and play sessions.
Real World Practice