Where do I find animal tracks? I need leather, but I don't know how hunting work?! I know you can hunt by traps, or birds with a bird pipe. But how can I hunt big animals like deers or wild pigs?

And how do I get farm animals like cows and sheeps and so on? I visit the near farm, but found nothing. No cows, no poop. Nothing...

And can I breed rabbits? Because I found a cage with a male and a female on it...