The King and Queen each fed a polo mint to champion racehorse Stradivarius during a visit to the National Stud in Newmarket, Suffolk. Charles held out the treat on his right palm for the stallion to take, then stroked the horse on the head.
Camilla also gave the horse a mint and petted it as the animal loudly crunched on the sweet. The King said afterwards: "At least he didn't bite."
Royal couple meets racing champions
His consort said "keep away from their teeth", adding: "Now he's looking for more polos." Charles and Camilla were shown four resident stallions on their visit to the National Stud, with each individually paraded before them.
The last of the four was Stradivarius, who has career earnings in excess of £3.4 million and 18 Group wins - more than any other European horse. The King and Queen, who arrived by helicopter, also spoke to people involved in the horseracing industry during Tuesday's visit.
Tree planting ceremony concludes visit
Charles shovelled soil into holes beside two already-planted field maple trees and Camilla then watered them from a watering can, before a round of applause. They left the National Stud in a dark blue BMW car.
(PA) Note: This article has been edited with the help of Artificial Intelligence.