A potential buyer looks in a horse's mouth at Skaryszew horse fair February 18, 2013. Polish animal rights campaigners heckled traders at one of Europe's biggest horse-trading fairs on Monday to try to prevent them selling the animals for meat. Horse breeders have been coming to the open-air fair on the same day every year for the past three centuries, but the tradition is under pressure from activists and, this year, from concern about the Europe-wide trade in horse meat. REUTERS/Peter Andrews (POLAND - Tags: ANIMALS BUSINESS) Published: Úno. 18, 2013, 3:22 odp. | Foto: Reuters