In countries like Argentina it can take 3 years. As you can see, if a farmer had to purchase the calf, feed it on seven kilograms of grain for each kg of gain, and then pay his staff and overheads, he is going to go bankrupt. In fact grain is mostly given at the end for a few weeks to give a fat cover. There are non in England, it is too cold. Making beef illegal would save no lives, it would just mean that the animals are killed sooner.
Every milk cow causes one death each year.
All over the world, the most profitable farming enterprise is arable crops. It is only the poor land, which can only grow grass, which is used for animal husbandry as its only enterprise. Therefore, it is the peasant farmers who would be displaced, and this glorious wild habitat would be destroyed. Nothing else will keep it as it is, because it is not natural and has been created by this type of farming in the last two millennia. My main hobby is planting native trees and creating local wildlife habitats.