Whinnied

from The Collaborative International Dictionary of English v.0.48

Whinny \Whin"ny\, v. i. [imp. & p. p. {Whinnied}; p. pr. & vb.
   n. {Whinnying}.] [From {Whine}]
   To utter the ordinary call or cry of a horse; to neigh.
   [1913 Webster]