Distress in animals: is it fear, pain or physical stress?
Both fear and pain can cause suffering. When pain is being studied, experiments must be designed to separate the variable of fear from the variable of pain. Some investigators claim that a sharp cut off line exists between those animals who experience pain and suffering, from those who do not. These arguments are based on the assumption that the capacity to suffer is related to the size and complexity of the brain, i.e., small brained animals feel less pain and potentially suffer less than animals with larger more complex brains. This paper refutes these claims and explains the concept that all ...
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