it’s a Nadudana.
They are a small breed which originated in India and
grow to around 107 cm, while some are less than 90 cm.
This is a Nadudana [pronounced nar-dar-nah] bull.

Info at; http://www.imza.name/whats_zebu.html and
http://www.nadudanacattleqld.com.au/index.php/nadudana-breed
The photos are from the Sarina Show, [Qld.],2005.