The Duchess of Cornwall beamed as she horsed around with a mare called Royal Rascal on a visit to the National Stud.
Camilla fed mints to the horse and its six-week-old foal in Newmarket, Suffolk, and also met three stallions, Time Test, Aclaim and Rajasinghe.
She opened the horse-breeding farm's refurbished Stallion Unit and met students taking the organisation's diploma in stud practice and management.
Tim Lane, managing director of the National Stud, said it was an "amazing visit".
It was Camilla's first visit to the National Stud since she was appointed as its patron.
The history of the National Stud, which was acquired by the Jockey Club in 2008, dates back to 1915 when Colonel William Hall Walker donated his bloodstock to the British government in an attempt to remedy the country's shortage of thoroughbred stallions.