I need help with a word!

I am writing about a horse and you know when they shake there heads and breath through there mouths and make that 'pww" sound XD
And there lips get all flappy?

Does anyone know a word that means that?


Thanks,
Gwen

Snort? XD

That's what I was thinking, but a snort is through your nose right?

Thanks though

neigh?

A neigh...hmm, no because they are not making any vocal noise. Just blowing through their lips XD

Snicker? (*wonders how many words we'll get through in this thread *)

I think it's "nicker," lol.

nicker... Its wicker!
Thank you all!