Indeed, it is a pity that man should be so cruel to animals when animals are so useful to him. Animals provide man with so many of his necessities of life. An overwhelming number of people in the world are non-vegetarians who eat meat of animals. Fishes are rich in Omega-3 which is so useful for human heart and for controlling cholesterol.
We get hides from animals which are used for making shoes, hags, purses, etc. We get wool from sheep. Seal oil is used by People in snowy regions. We get milk from cows, buffaloes, goats, etc. Some animals are used as beasts of burden, for instance, the camel, the donkey, the mule, the ox, etc. Horse is used for riding. Oxen are used for drawing carts. Snake poison is used as a medicine.
Similarly, numerous animals are used for numerous purposes. Man does thousands of medical and scientific experiments on animals for various purposes. If still man is not thankful to animals, shouldn’t we term him as an ungrateful, if not a detestable, cruel, cunning brat?