When a rooster crows, we say he goes "cock-a-doodle-doo". For hens, geese and horses, however, there is no word that closely approximates the sounds they make. There are, of course, words used to define the sound, but don't necessarily imitate the sound directly: Hens cluck, geese honk and horses neigh (sounds like "nay"). However, usually when the sounds are imitated, it is not with words but with vocal sound effects that you probably couldn't spell. For example, I have a friend who does good horse imitations (joking and after a few drinks). However, I would never try to spell the sounds he makes when he does it.

These types of words are said to be onomatopoeic, that is the word sounds like the sound it describes. Oink =pig moo = cow roar = lion cluck = hen honk = goose baa = sheep hiss = snake The onomatopoeia does not just apply to animal noises though: screech = tyres achoo = sneeze shuffle = feet

ahaahaa! No doubt! A rooster speaks indeed in the '-a-doodle-doo' vocal protocol as well as the pig uses the 'oink' one! But that is merely how far the extend to which their vocal expression ability has developed. Talking is a little bit more of a complex procedure than speaking, I hope the native english speakers do agree with my point of view. Having spent significant amounts of time comprehending the vocal-expression cognitive mechanism of various animals, cats, dogs, horses, sheep etc. I came to various conclusions about the ability and the individual decision of those animals to use voice towards establishing communication. The most worthy amid those conclusions is that animals would either not bother to attempt to establishing vocal communication protocols (the case of cats) since their 'hysteric' communication enables amid them adequate degree of understanding, or as in the case of sheep, those pray animals whose life aim is feeding carnivores, their lifespan is subjected to an extreme degree of stress and anxiety so that they simply do not have enough time and comfort to evolve an orderly cognitive development individually as well as a enhanced functional social awareness in their herd; think of the human of the cave era. Nevertheless, again from my personal observation, it became evident to me that most animals who share the same acoustic spectrum that the human does (mainly 800Hz-8000Hz ) possess the ability to establish essential vocal communication skills once they're domesticated and enjoy a human-like life standard. I guess many people have similar observations with their pets. The establishment of fundamental vocal communication (me Tarzan, you Jane) in comparison to the establishment of a language lies a long way far in a developmental point of view and is strongly dependent on the social/herd development level. I believe that the sound orally produced by most wild animals corresponds mostly to an emotional condition expression rather than being an attempt for logical communication, thus for most animals it is more a sort of a 'cry' rather than 'talk'.