It pains me to say this, but I'd have to go with the chicken option. I wouldn't enjoy it. It would be like killing a good friend over and over. Dollar-for-dollar, chickens are the cheapest source of animal protein on the planet. They are delicious. They make eggs, which are used to make tons of delicious desserts. I love everything about them, their supple breasts, their tender thighs, their succulent drumsticks. I would never want to hurt the blessed bird of gainz.

But bro, google "orangutan strength". Those things are 5 to 7 times stronger than humans. A sword isn't going to make any difference in a fight against one of those things. While you're trying to figure out which end is pointy, that thing will slam you to the ground and unplug your balls with its teeth. It'll wear your face as a trophy after it tears you limb from limb. A kangaroo would probably be the better animal for this question. They're also way stronger than humans, but a bit less coordinated, so you could almost see yourself winning.

Whereas, if I fight a chicken every day, I'd get used to it, and figure out how to win the fight with minimal effort. And in exchange for that minor inconvenience, I'd get a lifetime of free chicken. It's just common sense.