I visited Pig Island near Koh Samui. There were so many tourists there.

The island had the usual things for sale, but one of the main attractions was food for the piglets. If I remember correctly, a bag cost around 50 baht. They also provided metal trays for feeding the pigs so they wouldn't accidentally eat sand along with their food.

I saw a foreign tourist tempting one of the pigs into the sea by holding a tray of food in front of it. The pig kept following the food farther and farther into the water—by the end, it was practically swimming.