What are donkey's really saying?

There are a couple of donkeys and horses who live in a field just across the road from where I am staying, and they frequently come across the road during the day to graze amongst the olive terraces that lie beside my residence. One or perhaps both of the donkeys are prone to making the most gut curling ea-haw (or however you write that donkey noise, you know what I mean) at all the times of the day and night. Sometimes I wonder what they are trying to say and to whom, exactly, are they trying to say it. I imagine these donkey's could probably write the most moving laments or sad ballads were they able to, but perhaps they're just saying "alright mate" to their friends, and I'm getting it all wrong.