If your dog runs away, don't chase it. Lie down & pretend you're hurt.
How to catch a loose dog (Tip: don’t chase it!)
If you chase your dog, its instinct is to run. If you lie down on the ground and act hurt (yelping, etc.), its instinct is to come check on you and make sure you’re alright. Feels like a dirty trick at the time, but it’s worth saving your dog from getting loose or hurt.
What to do if a dog gets loose:
Stop, drop and lie down - It might sound silly, but dogs find the behavior odd. When you don’t give chase and instead lie down and lie still, a dog will get curious and will often come back to see if you are okay or to see what you are doing.
Stop, drop, and curl into a ball – This is also a curious behavior for a dog. Because you are not moving and your hands are closely wrapped around your head, they see you as less of a threat and will come to check you out. This gives them a chance to sniff you and realize it’s you, their owner, or to allow you to pet them and grab their collar.
Run in the opposite direction – What? Run away from the dog? That’s right. Some dogs love a good chase. Instead of you chasing them, let them chase you. Even if the dog is not up for a good chase, he may be curious about your odd behavior and follow along until you can get him into a building or car or someplace where it is easier to corral him.
Sit down with your back or side to the dog and wait – Again, dogs are thrown off by this odd behavior and will become curious and approach. The other advantage is that by sitting down with your side or back to them, you appear less threatening and they are more likely to approach. If you have good treats, place a few around you to draw them near.
Open a car door and ask the dog if she wants to go for a ride – It almost seems too simplistic and silly to be true, but many a dog has been fooled into hopping into a car because they were invited to go for a ride. It makes sense, especially if the dog has learned to associate the car with good things (e.g., the dog park).