Prince Charles is continuing his annual summer tour of Wales with a variety of engagements across south Wales.
The prince has been visiting a farm, a village celebrating its links with poet Dylan Thomas, and opening a south Wales valleys hospital.
He took particular interest in a stud offering ancient Chinese and Japanese methods of treating horses.
It follows Monday's visit to a Conwy Valley village which suffered severe flooding in north Wales in February.
Prince Charles, who is sleeping on the royal train, is spending three days in Wales this July.
His itinerary on the second day of the trip started at the Royal Ivy Bush Hotel in Carmarthen where he met business people over the age of 50, helped by the Prince to become entrepreneurs.
He is president of Prime-Cymru which has helped kicked-start more than 600 new businesses, now employing more than 1,300 people in Wales.
Prince Charles spent the morning in Carmarthen
He met dressmakers, photographers, florists and paid particular attention to the founder of a west Wales stud farm which practises "hands-on" alternative treatment for horses.
Allan Mogridge, who runs Equine Shiatsu Therapy Treatments at Haverfordwest, said: "The Prince was very, very interested in the therapy method.
"I do not think that he had ever actually seen it practised before and he asked me to show him a treatment.
"I demonstrated how I tune in and work with a horse. I feel blockages with my hands as a sensation and then try and relieve the tension.
"It all stems from ancient Chinese and Japanese methods, going back thousands of years. The Prince was very interested."
Later the prince toured Trebersed Farm at Traveller's Rest near Carmarthen where he met members of the South & West Wales Machinery Ring.
It is made up of farmers who pool their resources to share equipment, labour and resources.
Grant Harman, a partner in the business, said the prince was keenly interested in its workings.
"It enables us to do everything from bulk buying fuel, at a reduced cost, to sharing expensive resources and purchasing equipment for everyone's use communally."
He moved on to the village of Llansteffan in Carmarthenshire, which is commemorating the death in 1953 of poet Dylan Thomas who had strong connections with the village.
He also met schoolchildren involved in producing a mural depicting the history, culture and literature of the area, and unveiled a plaque in the village school celebrating its 50th anniversary.
Later the prince will travel to Prince Charles Hospital in Merthyr Tydfil to visit its new £38m extension and meet patients in the paediatric and cardiac units housed there.