. >> reporter: wayne chung and julie anne parry provided abc news with the footage, most of which can'toadcast under abc's standards. >> i was shocked. breeds that americans know very well. >> you walk towards the slaughter house and you just hear screams. >> reporter: many waiting to be killed appear to have collars, they say. >> there are gangs of men that maraud the streets and will steal dogs off the streets because they know they can get 40, $50 if they ship dothem dow for a dog meat festival. >> reporter: it's been a tradition in china for centuries. they believe it will bring good luck. >> it's not wide spread. there are a few pockets where it's still ongoing and they believe dog is healthy for their body. >> two of the men picked up metal poles and were hitting them in their hands and i remember sitting next to wayne thinking this might be where i die. >> reporter: the activists also found farms outside the city where dogs are being raised for slaughter. under chinese law, it is legal to sell dog meat and in a statement, the chinese government called it the food preference of in