bleat

nouns

the sound of sheep or goats (or any sound resembling this)
is a type of (narrower)
the characteristic utterance of an animal
"animal cries filled the night"

verbs

talk whiningly
is a type of (narrower)
express complaints, discontent, displeasure, or unhappiness
"My mother complains all day"; "She has a lot to kick about"
cry plaintively
"The lambs were bleating"