What is the feminine of the noun cock?

In English there are no masculine or feminine forms. English uses gender specific nouns for male or female.

The noun 'cock' is the noun for a male of the following species:

The noun 'cock' is a gender specific noun for a male:

bird in general

chicken

dove

finch

guinea fowl

gull

heron

hummingbird

jay

lark

lobster

lyrebird

magpie

nightingale

ostrich

parrot

partridge

peafowl

pheasant

pigeon

quail

raven

salmon

The corresponding gender specific noun for these species is hen.