bleating
noun
[ ˈbliːtɪŋ ]
• the weak, wavering crying of a sheep, goat, or calf.
• "the plaintive bleating of sheep"
bleat
verb
• (of a sheep, goat, or calf) make a characteristic weak, wavering cry.
• "the lamb was bleating weakly"
Origin:
Old English blǣtan, of imitative origin.