The greyhound industry is "in denial" about the fate of thousands of dogs which are slaughtered in "canine killing fields" after they pass their racing prime, the chairman of a cross-party animal welfare group said.
Eric Martlew MP said he would be urging his colleagues to launch an urgent inquiry into dog racing after reports that a County Durham build-er's merchant has killed and buried at least 10,000 animals at his home.
The Government last night also said it will look at a Sunday Times investigation which claimed David Smith spent the past 15 years filling land at his home in the village of Seaham with canine carcasses.
Carlisle MP Mr Martlew said the Associate Parliamentary Group for Animal Welfare would hold an urgent meeting about the case today and he will press for an immediate inquiry.
He added that despite the good work of charities which work to rehome greyhounds, the problem of hundreds of healthy dogs being killed every year had been a concern for animal welfare groups for many years.
The newspaper said it covertly filmed Mr Smith receiving greyhounds, killing them with a bolt gun and then burying them on a plot at the back of his home with a digger.
Under current law no licence is needed to put down animals with a bolt gun.
Mr Smith said it took him three years to fill the field and then, as the bodies had decomposed, he would start filling it again.