Chicken

Chicken (Common rarity) belongs to the Forest zone. Forest is the starting zone, so there is no speed gate — the Chicken guardian is the only thing between you and the nest. You get it by carrying the Chicken Egg back to your pen.

At $1/s base income, Chicken sits 8th out of 8 in its zone — Brr Brr Patapim tops the Forest at $1.8K/s. The listed figure assumes no mutation and a normal weight.

With a colour mutation and no size bonus, the same Chicken would earn roughly: Silver ×1.2 ≈ $1/s, Golden ×2.5 ≈ $2/s, Rainbow ×3.5 ≈ $3/s (multipliers from the wiki's Mutations page; arithmetic is ours). Add a Giant (×3) or Huge (×5) size roll on top and the numbers multiply again.

Hatching it pays a one-off reward of +420 Speed, $100, and the egg takes 10s to grow in the pen. That reward is the reason low-income eggs are still worth stealing early: the speed bonus is what gets you into the next zone.

Commons are the eggs you steal while learning the guardian's patrol. Do not over-invest a pen slot in one once the next zone opens.