Possible Clues:

• Witty saying about very good butter substitute turning up
• Witticism - adage
• In a manner of speaking ''e makes a pair of farmyard animals quite witty
• Overindulge in backing horse, evoking pithy comment?
• The East has something witty to say for farmyard animals
• Snappy piece of wit
• Saw the animal, a horse, turning round
• Short, memorable saying
• Form of wit in English, with a couple of stock examples
• Witty saying in English 'One who gorges on sheep'