Dogs sometimes refuse to take no for an answer when they're desperate to say hello, and no bush, wall or fence can keep them from shoving their head through to greet their neighbor face to face.
This almost manic drive to see who or what is living next door can result in wrecked fences, tunnels dug in the dirt under walls, and a sad little pooch with a stupid look on his face when he realizes he's stuck.
Of course, not all dogs are saddened by the prospect of being stuck, because they're just happy to be out of the house!
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And the converse...
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