"John Inslee Blair ... was unusual among tycoons of the age for spurning decadent luxury. On losing in the race for NJ governor in 1868 he remarked that he was like the man who took his hogs to the wrong market: 'I wasnt elected governor, it is true, but I had the society of the finest hogs you ever saw.' "http://www.goodbyemag.com/nov99/100yrs.html
Could this witticism have given rise to a proverb? Or been based on one? Hard to tell. But "hogs" at least does seem a bit rural-American.
"Those who promote Tefertiller's work by stressing he's a 'trained journalist' have brought their ducks to the wrong market. Today's 'trained journalists' are taught to rely heavily on two things--official sources and prior news stories. Thus Tefertiller's bibliography neglects many secondary sources." http://www.tucsonweekly.com/tw/08-27-98/feat.htm
Another American one, if no hogs. OTOH, back across the pond...
"Now, however, the residents of Godshill, after several years under siege from sheep, find themselves facing a new menace. Vietnamese pot bellied pigs are causing havoc, apparently under cover of the Breeding Sows Privilege[,] and complaints are beginning to filter through to the Verderers. Since the privilege is strictly a Commission matter, they might be said to have brought their pigs to the wrong market. However, it is hoped that this new upset will not prejudice responsible pig keepers[,] who cause no problem and for whom the Privilege is a valuable concession.
"The response of the equine community to these small black squashed faces [--] horrors [--] can be imagined by anyone who rides and who knows the effect of a standard British pink pig emerging from a bush."http://www.geodata.soton.ac.uk/newforest/publ...
SCNR sharing this one in all its glory (to be filed under "there'll always be an England"). Gave me the feeling that someone just might have been scraping the bottom of the trough for porcine idioms... (-: