Rancherino's "Raise an Evil Chicken" task
This task of the Rancherino Big Dream was the most difficult, time-consuming one for me.
At one point, I was puzzled why the farmer's wife was throwing away the incubating Obsidian Eggs then later realized that only Hatchable Eggs can be incubated without spoiling.
If one of your sims decides to try the Rancherino Big Dream (which i quite enjoyed), here are two tips to make the Evil Chicken task a speedier process.
Tip #1: As soon as your rancher gains a Midnight Treat, give it to a young adult hen to create an Evil Hen
Don't worry about saving that first Midnight Treat, like I did.
Your new Evil Hen will lay enough Obsidian Eggs for you to later make your own Midnight Treat and Spicy Treat for the Make All Animal Treats" task.
Tip #2: To get a Hatchable Obsidian Egg faster, move your Evil Hen into a separate coop with her own rooster.
Background: At first, I had a coop with one normal rooster, 2 Golden Hens, 1 Evil Hen, and 4 normal hens.
Despite giving Flirty Treats (to promote rooster breeding and increase a hen's chance of laying a hatchable egg) to both the rooster and Evil Hen, she only laid non-hatchable Obsidian Eggs.
Yes, the rooster had a higher chance of breeding, but he was apparently not breeding with the Evil Hen.
Hatchable Eggs!: The day after I moved the Evil Hen and a new rooster into a new coop with its own fenced-off yard, the Evil Hen laid a Hatchable Obsidian Egg.
The very next day, she laid two more Hatchable Obsidian Eggs and several more since then, without Flirty Treats.
I also turned the Evil Hen's rooster into an Evil Rooster, but I don't know if that's why the Evil Hen produces only Obsidian Eggs.
Aging Up; My first Evil Chick took nine days to mature into a young adult, thus completing my Rancheringo Big Dream.
I'm sure the wait wouldn't have seemed so agonizingly if I'd started the task earlier and gave the Evil Hen her own breeding grounds from the start.