If your dog is trained to come when called, try calling their name and then giving the recall cue, also using the tone you'd normally use for the exercise. (siskiyouhumane.org)
If you are using a pen or cage, the best solution is to put the pen in the room used for exercise. (rabbitrr.org)
If you're using it for exercise then battery drain is heavier: a 30 minute run will mean that the watch is likely to be dead by late afternoon. (pocket-lint.com)