That would be called stealing.
Listen, that's how people make their money, feed their families, live their lives. You cant take that away just because you dont like what they're doing. Now, unless these animals are actually being abused, I suggest you let it be. Often times the animals are well cared for and kept healthy, I mean, people dont want to eat an unhealthy animal, otherwise we wouldn't be healthy.
Please try to understand the situation, and don't steal just because you dont want someone to have something of their own.