The key there is "intentionally do harm." Buddhism is a practical belief system. There are some traditions which are vegetarian, in places usually that have lots of vegetables, places which follow the original tradition of accepting what is offered, and places where meat is on the diet. This has perennially pissed off the people who believe eating is a big hairy moral issue, but what you eat is not a part of the practice. If some thing is edible, you can eat it. If something is alive, try not to hurt it. Life is complex and sometimes these conflict. Work out your solutions and see how you did, then learn if possible from any mistakes. It is not a part of Buddhism to interfere with the prey/predator relationship even if the predator is human. Nature has an order to its flow that must be respected. Becoming a predator however is not recommended for Buddhists even if other people wish to do that. Likewise becoming a theif or a soldier or a gambler or a drunk or a prostitute, etc. are all not recommended. Of course being human, Buddhists can be found doing all of those. And those people aren't to be condenmed even if it is best not to emulate them.