I've seen two leashes used, one on the collar and one around the waist, to teach heeling straight. It takes some coordination! I've tried it

It does work if you can get the technique down. However I haven't walked a dog in public with a leash around it's waist. That is wierd.
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If you pick up a starving dog and make him prosperous, he will not bite you; that is the principal difference between a dog & a man.
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