Based on the Vedic knowledge, the butchers, cooks, servers, and eaters of living beings are considered sinful and irreligious. Those who eat the flesh of others to sustain their own flesh are known as animal consciousness living beings. All living beings are very dear to Lord Krishna (God) and He punishes those who hurt others.
“If one is unhappy to see the distress of other living beings and happy to see their happiness, his religious principles are appreciated as imperishable by exalted persons who are considered pious and benevolent.” (Srimad Bhagavatam 6.10.9)
“By the arrangement of the Supreme Lord, low-grade living beings like bugs and mosquitoes suck the blood of human beings and other animals. Such insignificant creatures are unaware that their bites are painful to the human being. However, first-class human beings — brāhmaṇas, kṣatriyas and vaiśyas — are developed in consciousness, and therefore they know how painful it is to be killed. A human being endowed with knowledge certainly commits sin if he kills or torments insignificant creatures, who have no discrimination. The Supreme Lord punishes such a man by putting him into the hell known as Andhakūpa, where he is attacked by all the birds and beasts, reptiles, mosquitoes, lice, worms, flies, and any other creatures he tormented during his life. They attack him from all sides, robbing him of the pleasure of sleep. Unable to rest, he constantly wanders about in the darkness. Thus in Andhakūpa his suffering is just like that of a creature in the lower species.” (Srimad Bhagavatam 5.26.17)