Callistemon that is for beef for consumers in Australia, but with all the animals the country has, the majority, presumabl,y go to export. Do these conditions apply to them as well?
As for the animals we eat, humans generally eat herbivores only. Dog, a carnivore, is eaten in China, but I think that originally was a reflection of the extreme poverty and famine conditions many of the Chinese lived in for centuries rather than by desire. It then became a delicacy.
Indeed it is strange how the extremes of food, eaten first by the poorest, become delicacies: shark's fin soup, mincemeat (originally the rotting entrails of an animal made edible by adding spices and fruit to it) caviar, haggis
During military sieges, including during WW2, people have been reduced to eating rats and cockroaches and shipwrecked sailors have been reduced to cannabilism, but I do not think anyone would use those circumstances to justify them as formng part of our diet. However I have no problem with horsemeat. A horse is a herbivore.
With so many foods, animal and vegetable to eat, it is not surprising that every society has its own group of foods it does or not eat.
In Britain, and much of northern Europe, the farm labourer and his pig, were an architype of rural life. In the heat of the Middle East, the avoidance of pork, essentially because of its disease transition capacity, is so deeply felt that it is entrenched in the rituals of both Islam and Judaism. In this country we did not eat fresh pork in the summer months for the same reasons.