Chicken:  

Food: Chicken Feed  

After feeding, the chicken will produce eggs in the poultry yard. These eggs can be used to fulfill orders or make other items.  

After 16 feedings, the chicken will turn into a golden statue.

Cow:

Food: Cattle Feed

After feeding the cow, it will produce milk, which can be used to fulfill orders or make other items.

After 24 feedings, it will turn into a golden statue.

Sheep: (Unlocks at level 17)

Food: Sheep Feed

After feeding the sheep, it will produce wool, which can be used to fulfill orders or make other items.

After 24 feedings, it will turn into a golden statue.

Turkey: (Unlocks at level 21)

Food: Turkey Feed

After feeding the turkey, it will produce turkey eggs in the poultry yard, which can be used to fulfill orders or make other items.

After 16 feedings, it will turn into a golden statue.

Pig: (Unlockable at Level 23)

Food: Pig Feed  

After feeding the pig, it will produce sausages, which can be used to fulfill orders or to make other items.  

After 10 feedings, it will turn into a golden statue.

You can also buy Advanced animals in the market with gems. Their output is double that of regular animals! Of course, the Advanced animals you purchase with gems will also turn into golden statues and bring more rewards.