Research firm Genesus Genetics estimates China's total pig population at more than 470 million.
The two horsemeat-free samples were found to have pig DNA at below the 1% threshold.
Jonathan French said friend Jeremy Barber spent about 40 years building up his pedigree pig breeding business at Seaborough Manor near Beaminster.
While the new virus strain in the recent outbreak has affected humans, Canadian officials said it has shown up at a pig farm in Alberta, Canada.
On Wednesday the Food Standards Agency said it would co-ordinate a UK-wide survey of beef products to test for the possible presence of horse or pig DNA. There will be "additional emphasis on brands at the lower end of the market, particularly for burger-type products", it said.
Two man-sized llamas - one brown called Louis, one white called Rupert - unnervingly stare me out as I wander past a Gloucester Old Spot pig snuffling among the apples at the base of a tree.
First these results have to be replicated in the larger pig hearts Those experiments are under way at the University of Minnesota.
But transplanting pig cells into people is still controversial, since it brings the risk of transplanting pig diseases (which may be contagious) at the same time.
At the celebrity hideout Chateau Marmont, the room service star is Carolynn Spence, who popularised the US gastropub trend at New York City's much-heralded Spotted Pig restaurant.
They volunteered to work on a pig farm at a kibbutz called Dafna, in the Upper Galilee, near the Lebanese border.
Made with collagen-rich pig skin, it is solid at low temperatures but melts into liquid when the dumpling is steamed.
The money from the investment was to install new equipment and improve technology at the facility, which is the largest pig processing plant on the island of Ireland.
At the start of the year, new and expensive rules on pig breeding came into force.
The FSA has requested that local authorities test minced beef products and ready meals sold at shops, wholesalers and catering suppliers for horse and pig DNA above a 1% threshold.
Ministry of Agriculture, Fisheries and Food (Maff) officials now say the highly contagious virus may have been spreading from a pig farm at Heddon-on-the-Wall, in Northumberland, for more than two weeks.
In response to the horsemeat scandal, the FSA requested that local authorities test minced beef products and ready meals sold at shops, wholesalers and catering suppliers for horse and pig DNA above a 1% threshold.
It works by heating the moisture in a person's skin to the point where it feels, according to Kelley Hughes, an official at the directorate who volunteered to act as a guinea pig, like opening a hot oven.
Officials say subsidies aimed at encouraging pig-rearing should cause the pork shortage to ease by the middle of next year.
ECONOMIST: Inflation in China: An old worry nags again | The
She promised to kiss a pig at the end of the first year, if the children together racked up 4, 000 points.
To show Zylast works for hours, Innovative BioDefense funded a study done at Pace University in New York that tested the product by applying it to swatches of pig skin.
Alan Reilly, the chief executive of the Irish food authority, said there was a "plausible explanation" for the pig meat finding its way into the burgers, since meat from different animals is processed at the same plants.
Tony Blair once told a Labour conference a story about the man employed by Prince Philip of Macedonia, the father of Alexander the Great, to carry a black stick with a pig's bladder on the end and wake him up at night to remind him he was only mortal.
Police said a guinea pig was also stolen at around 16:15 GMT when the group left the farm in a silver Ford Focus.
"Without the legally binding contract that the European retailers have signed, it's just putting lipstick on a pig, " said Bob Ross, a critic of sweatshops who teaches sociology at Clark University in Worcester, Mass.
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