Hello, tell me what started your interest in chicken? 
Chicken is a domesticated fowl
What is a domesticated fowl?
A subspecies of the red jungle fowl. Human keep it as a source of food
great! Are there different subspecies of chicken?
Yes there are. Chicken is gallus gallus
Ok, nice! Why do humans use it a food source? 
The chicken is easy to domesticate. 
Is it expensive to maintain domesticated chicken?
Chicken
The chicken ("Gallus gallus domesticus") is a type of domesticated fowl, a subspecies of the red junglefowl ("Gallus gallus"). It is one of the most common and widespread domestic animals, with a total population of more than 19 billion as of 2011. There are more chickens in the world than any other bird or domesticated fowl. Humans keep chickens primarily as a source of food (consuming both their meat and eggs) and, less commonly, as pets. Originally raised for cockfighting
the oil palm.
Relationship to humans.
The red junglefowl was domesticated for human use well over 5,000 years ago as subspecies "Gallus gallus domesticus." Known as the chicken, it is a major source of food for humans. However, undomesticated red jungle fowl still represent an important source of meat and eggs in its endemic range. The undomesticated form is sometimes used in cock-fighting.
Relationship to humans Timeline of domestication.
In 2012, a study examined mitochondrial DNA recovered from ancient bones from Europe,