DS13 takes care of the dog, DD is responsible for the parakeet, and DS10 and I care for the chickens, with occasional help from the other two (like if I hear an egg song and can't go out right then to check). I also do the garden (a friend's husband comes with his tiller in the spring) and am training DS13 to do the yard but mostly I do that too.
Since our washer died I also have laundry duty b/c the children are afraid of the laundromat. I have decided that I will have a new washer before the weekend so that will go back to being DD's responsiblity. I don't like doing laundry.
DS10 has kitchen duty, a consequence of dumping a whole dishpan of dirty dishwater on a freshly waxed kitchen floor about a year ago. He has to clean up the kitchen until he: does all the dishes and gets them clean, wipes down table/counters/stove, takes out trash and sweeps floor, without being told to do any of that. I'm still waiting. Yes, he is stubborn, but I have almost 40 years more practice at being stubborn and I will win this battle.