Yep, pet chickens can live up to 15 even 20 years if they make it though all the dangers in life.
They are "snacks" to a huge range of predators.
Often carry genetics that do not confer longivity, such as the propensity to have tumors and cancer or other health problems because parents were all bred young and no selection for longer life has taken place
Can be susceptible to sickness as they age.
However, with the right care and living in fort knox, they should easily get into their teens IF they do not come down with tumors or other health issues before then.
Welcome aboard and hope you enjoy your new babies!