He got the eyes wrong.
They are gentle creatures, cows – they were rightly chosen as vessels to convey the message of peace. He won the bid to paint them with his flower and heart-shaped leaf design.
It’s a good design: bold colours, strong symbols. It works, it emphasises the message. If it weren’t for the eyes, it’d be a triumph.
Instead of a gentle, peaceful expression, the cows’ eyes burn with hostility. He got so engrossed in the colourful depiction of love, he made a glaring mistake with their eyes – undoing the message.
And he only notices as they’re unveiled.