I didn't know Second Life had chickens now. That's pretty cool!
When I played the original Sims, I downloaded a chicken someone had created. They used to have some pretty cool hacked items you could download. There was special chicken feed you had to feed it. You had to fence them in, so they didn't wander too far away from the food and not be able to find it. Not the brightest AI on those chickens! The chickens would lay eggs that you could either eat, maybe sell or let hatch into chicks. After a certain amount of time, the chicks then turned into adult chickens. You could let all the new chickens lay more eggs or sell them, too. My chicken farmer also had a big garden, vineyard and bee hives of course. All these goofy games are surprisingly fun to play.
In WoW, I have little gnome alts on two different servers named Banty. I like all my WoW toons to have chickens as companion pets. If they are too low a level to get them on their own, a higher level alt sends the Ancona chicken you can buy and/or the special chicken feed, to do the Westfall chicken quest.
One of my higher level alts recently did the three part quest to get the mechanical chicken. My husband even had his level 80 toon do it with me. He hasn't done the Noggenfogger quest, either. I don't know how he misses out on these important details of gameplay. Obviously, he needs me to help him!
I've played several different MMOs, but combat alone is too boring for me. Actually, combat just supports all my other ingame activities.