chicken
鶏 centers on the domesticated chicken, the common bird raised for eggs and meat.
鶏 is the modern simplified form of 鷄. The older form combines 鳥 (bird) with 奚, which likely contributed the sound and originally depicted a hand over a person, later associated with domestic fowl. The modern left side 爫夫 is a simplification of 奚.
The right side 鳥 is a bird, and the left side 爫夫 looks like a hand (爫) over a person (夫), suggesting a bird kept and handled by people: a chicken.
For ケイ, imagine a chicken pecking at a cake: cake -> ケイ, and the chicken enjoys the treat.
chicken (Gallus gallus domesticus); domestic chicken
chicken meat
poultry raising; poultry farming; chicken farming
hen's egg
weather vane
game fowl; gamecock
male bird
cockscomb; comb; crest
cockfight; fighting cock
(Japanese) bantam
brambling (bird) (Fringilla montifringilla)
samgyetang (Korean dish); chicken ginseng soup
bang bang chicken (Szechuan dish of chicken in a spicy sauce)
Okinawa rail (Gallirallus okinawae)
poultry house
mouth-watering chicken (Chinese dish of steamed chicken with a spicy sauce)
first cockcrowing
third cockcrowing
first cockcrowing of the year
using a meat ax when a knife would suffice; taking a sledgehammer to crack a nut; using a grand-scale measure (a massive instrument) to deal with an insignificant problem