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1. Hugo

Check, this, guy, out.


2. Nonhuman animals other than Hugo

Domestic chickens are highly inteligent animals that exhibit complex social behaviours (e.g., deception, learning from others) as well as some evidence for empathy [1, 2].
The same goes for cows and pigs. Plus, they suffer from loss of their children, and the children development is severely perturbed by the separation from their mother [3, 4].
Whether reared for their flesh or their milk, most of the livestock live lifes not worth living, filled with discomfort and suffering [4, 5, 6].

If you consider this to be an issue, then you can try to reduce the presence of animal products in your diet, perhaps even remove them completely, or at least select producers that ensure a high degree of animal welfare on their farms.

[1] L. Marino, Thinking chickens: a review of cognition, emotion, and behavior in the domestic chicken, Animal Cognition 20 (2): 127-147 (2017); accessible here
[2] J. L. Edgar, J. C. Lowe, E. S. Paul and C. J. Nicol, Avian maternal response to chick distress, Proceedings of the Royal Society B: Biological Sciences 278 (1721): 3129-3134 (2011); accessible here
[3] L. Marino and K. Allen, The Psychology of Cows, Animal Behavior and Cognition 4 (4): 474-498 (2017); accessible here
[4] M. B. Jensen, The role of social behavior in cattle welfare. In C. B. Tucker (Ed.), Advances in Cattle Welfare: 123-155 (2018); accessible here
[5] K. Kolbe, Why Milk Consumption is the Bigger Problem: Ethical Implications and Deaths per Calorie Created of Milk Compared to Meat Production, Journal of Agricultural and Environmental Ethics 31: 467-481 (2018); accessible here
[6] S. Puryear, S. Bruers, L. Erdős, On a Failed Defense of Factory Farming, Journal of Agricultural and Environmental Ethics 30: 311-323 (2017); accessible here


3. Other

If you expect that you or your offspring will be alive in 2050, you might be worried about the growing negative impact of the humankind on the planet.

If you are not, then you can have a look at the World Scientists' Warnings to Humanity: 1992, 2017 (only a couple of minutes of reading!).

NEW! IPBES Global Assessment Report on Biodiversity and Ecosystem Services, May 2019: report's overview, detailed summary.

If you feel like doing something about this, you might try putting pressure on policy makers. Extinction rebellion.