For centuries, Descartes claimed animals were "automata" (machines) incapable of feeling. Neuroscience has destroyed that myth. We now know that birds have REM sleep. We know that octopuses—with their distributed nervous systems—feel pain and may dream. We know that cows have best friends and experience stress when separated from them. The biological wall between "us" and "them" is not a wall; it is a porous membrane.
The scale of industrial agriculture makes maintaining individual welfare difficult, leading to debates over "ag-gag" laws and environmental impact. bestiality videos of dog horse and other animal link
However, there is hope. We are seeing a surge in "clean meat" (lab-grown) technology that could eliminate the need for livestock slaughter. Dozens of countries have banned the use of wild animals in circuses, and several nations have recognized animals as "sentient beings" in their constitutions. Conclusion it is a porous membrane.