Mirror mirror on the cow!

Popped to the shops to buy a list of odds and ends - some towards my holiday in 3 weeks.
There is a collection of sponsored cows on show.  Too many to show you all, but the extra is the Woburn Abbey entry.
As the above example was decorated by a local framing and mirror company, how many mirrors were broken in the making?
They make a change from the black and white concrete cows normally associated with Milton Keynes!