I mean we can also make long lasting clothes out of natural fibers without hurting animals.

You can indeed. But growing cotton has already resulted in environmental changes beyond my comprehension.

I guess the first step should be to adapt a habit of clothes repair

Growing cattle has also had a massive impact on the environment. And you often need more land for animal based materials because you both need land for the animals and the land to grow food for the animals. With cotton at least you just need land for the cotton.

Why is this always brought up, stop spreading this. Animals usually are not fed grain unless it’s harvesting time. We also do not grow food just to feed them. The grain we feed animals is shit you cannot eat. It’s roots/stalks/stems/bad/rotted plant matter. It’s the leftovers from the greens we can consume. Most animals also are raised on land that is not suitable for crops, rocky/hilly/weak topsoil land.

Mate, I have three chickens at home and I feed them a scratch mix that is mostly grain. I think you’re talking out of your arse, and I strongly doubt you have any actual animal husbandry experience.