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by pete762 2347 days ago
No, animals in the wild are not under constant stress, because that would completely nullify the effect of stress in the first place. Stress is a bodies' response to an 'unusual' situation, in which you have to act in an 'unusual' way. But the baseline that defines 'usual' and 'unusual' is the environment in which the animal evolved over thousands of years. In this environment their stress response is natural, e.g. spikes in case of danger or exceptional threat, otherwise normal.

If you now bring those in a completely new environment (factory farming), their stress levels go wild.