• 鶏にわとり — chicken; hen; rooster
• 鶏肉けいにく — chicken meat
• 鶏頭けいとう — cockscomb (flower); rooster’s head
• 養鶏ようけい — poultry farming
• 鶏鳴けいめい — cockcrow; rooster’s call (literary)

With the bird radical 鳥, 鶏 specifies the domesticated bird — the chicken. The right side sharpens the meaning toward the barnyard bird that crows at dawn.