The full answer
Chicken is a permissible species, but not every chicken is Zabiha Halal.
The bird must be slaughtered according to the requirements of Zabiha.
Ordinary chicken from a supermarket or restaurant should not be assumed Halal simply because chicken itself is permissible.
Answers in the Halal Knowledge Center reflect the standards followed by Halal Monitoring Services (HMS). HMS certifies only what it checks.