Okay, so your dog isn't trained to come back to you yet and it slipped off of its leash. Here are five ways to help get Rex back quickly.
1 - Run in the opposite direction!
2 - Call your dog in a cheerful, happy voice while clapping your hands and backing up quickly.
3 - Lay down on your back.
4 - If your car is nearby and your dog loves going for car rides, open the door (then reward him with a quick ride to the park so he'll come next time!).
5 - Ask a friend or neighbor to call him.
When he does come back to you, be sure to give him some rewards - a quick romp or play session, some treats (the good ones not the dry crumbly ones nobody wants), and lots of praise. NO, NO, NO scolding no matter how annoyed or late for work you are. Then, begin working on teaching a rock-solid recall so you'll be better prepared next time!
Cara, Austin Dog Training and Behavior