You are absolutely right that there should be a law that prevents humans from using animals for their own purposes, but then I also think that there are many things that humans do through animals. If those works are not done, then how will man do them, but after that I get the answer myself that countries have developed so much technology and so much work can be done here and there too. So it can be done that without harming the animals, this animal is sacrificed without us using it