Videos and images of the freakish pigs have gone viral after being posted on Facebook.
The page is called Duroc Cambodia, referring to a common breed of domestic pig which originated in the US.
But the farmer, thought to be based in Banteay Meanchey province, appears proud of his stock.
Some of the super-sized animals have enormous testicles while others are barely able to walk because of their muscles.
The desire for increased muscle is thought to be driven by increased prices for pork by weight.
Demand has soared in recent years, especially in China which is the world's biggest pork market.
Many have been left outraged and have accused the farmer of using steroids and growth hormones to get the astonishing results.
Reports first surfaced in 2015 of 'double-muscled' pigs in South Korea and China that were the result of a single gene alteration.
The aim was to produce leaner meat at higher yield.
But of 32 pigs bred, only 13 survived to eight months old and only one was considered healthy.
http://www.mirror.co.uk/news/world-news ... s-11256982