Eventually, we will figure out how to turn plants into milk then the cows themselves will be replaced by machines. If you think about it a cow stable is just a huge bioreactor, plants in on one side milk out on the other side.
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Cockroach Milk: Nutrition and Benefits:
https://www.medicinenet.com/cockroach_milk_nutrition_and_ben...
>Ethical concerns
>There are concerns about whether it is ethical to produce cockroach milk in bulk because it requires killing almost 1,000 cockroaches to extract 100 mL of milk.
I've heard the same ethical concerns raised about eating MAGA brains!