Bó

Did you know:
Wealth used to be measured in cows in Ancient Ireland - the ultimate in poverty was owning only one cow
Payment was often made in cows, poets charged between one and ten cows depending on how good the poem was.
Cows were also included in the bride price or dowry - When a king of Tara married the daughter of the King of Offaly, he promised four score cows, two score at once, and two score not later than the next May Day.
Cattle raiding was a national pastime. There's an epic tale all about it Táin Bó Cúalinge (Cattle Raid of Cooley) when Queen Maebh decided to steal the enormous Brown Bull from the King of Ulster. It didn't end well. For anybody. 
The Irish word for boy is buachaill  ( try boocull) which originally meant cowherd
The irish word for road is bóthar meaning cow path - originally the width of two cows, one seems to have been going forwards and the other sideways
St Bridget was raised on the milk of a white cow with red ears. 
There's even a holy well named after a cow - Tobar an Bo Finne, Well of the White Cow - the largest in Cork. The well that is not the cow. 

Apparently 17th July is Cow appreciation day