"Truth is, Fido doesn't work like a dog's nose does at all, " says Colin Cumming, Nomadics' chief executive.

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Usually you see homeless people with a dog, it's a dog that's like the guy.

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"Well, Joe has been working like a dog since he's been here this week, " Faulkner says.

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The result is rather like tying a flashlight to your dog's head.

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"Sometimes you work like a dog on a car and it's not very fast, " he says.

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The PetsCell, measuring 12.5cm (5 inches) by 7.5cm (3 inches), is shaped like a bone and is attached to the dog's collar.

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Like any older dog learning a new trick, Lady's first steps into the pool were tentative.

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It's like trying to separate a bark from the dog and selling the bark separately.

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"Whenever he plays that song, he digs into the melody like a dog that just got a big, juicy piece of meat, and he's growling and shaking his head back and forth, " Parks says.

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