Every dog in the area was allowed to humiliate the underdog, either verbally or physically. Those who were able to could bark and snarl and even bite him, while others could tease and taunt him, and he was never allowed to fight back even in self-defense. So all the dogs, puppies and even female dogs were allowed to attack him in any way they like.
On the other hand, the dog leadership rules have no provisions for any leader to voluntarily resign. A leader either dies on the job or become an underdog. Old age is the long-term inevitability, but the prospect of becoming an underdog is short-term reality.
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