'Filly' is the name given to a female horse that is younger the 3 years of age.
An immature female sheep is called a ewe lamb. An immature male sheep is called a ram lamb.
gilt
Chick. Pullet is for an immature female and cockerel is for the immature male.
Gilt
An immature female duck is called a duckling. Once the female duck matures it is called a hen or duck.
An immature sow
There are only male sea horses no female
A ewe lamb or if slightly older a maiden ewe.
I'm not exactly sure what you mean by what is the male name for mare. A mare is an adult female horse. An immature female is a filly. So if you are asking for the male gender name for a horse, it is Stallion for an intact male, gelding for a castrated male, and colt for immature male.
kitten
An immature female cat is commonly referred to as a "kitten." Kittens are typically considered to be in this stage from birth until about a year old, when they reach maturity. During this time, they are known for their playful and curious behavior as they grow and develop.
An 'Abby"