The industry calls it “eyestalk ablation”—a method used to force female shrimp to reproduce faster. According to shrimp welfare project : “Researchers discovered that when shrimps are subjected to ESA, they try to escape it. They also flick their tails and rub their eye area. When the wounds are covered or medicine is given, the shrimps calm down. This suggests that the ablation caused them pain and distress. Ablated females’ offspring are less tolerant of stress. They are also more likely to get diseases. There are many possible stress factors for animals in aquaculture. These include handling, crowding, high stocking densities and poor water quality. Eyestalk ablation is one more thing that worsens their welfare.”
So that’s how your dairy might have done it, but ours just let the bulls fuck. I don’t know why (they sold the farm when I was like 12) but that’s how they did it. Most of what I did was buck hay and hook up the milking machine.