Guo Caihong from Central China's Henan province said her sick three-year-old girl is receiving no care now.

She said the girl had been suffering from kidney stones after drinking Sanlu milk for more than a year.

"I sent her to the hospital in August 2008, when a stone of 13mm was diagnosed in her right kidney. Then after receiving medical treatments in the hospital for about 22 days, my girl was ordered to go home. By then, the stone was still 6mm," Guo told China Daily.

Guo said she is worried about possible long-term impacts on her daughter's health.

"Now it seems nobody cares about my girl, though she has not fully recovered yet. What if problems occur in the future?"

Zhou Xiong, from Wuhan of Central China's Hubei province, is father to a 2-year-old son who has suffered from kidney problems since June 2008, allegedly caused by tainted Sanlu formula. He said that local hospitals will not admit the sick boy.

"The hospital just ordered my son to go home and drink water," he said.

Zhou said he hopes the government can come up with a treatment plan so that sick children like his son will be "insured" in case of any future health problems related to the tainted milk.

The two families were each offered 2,000 yuan ($290), according to a compensation plan that was offered last year, but both of them turned the money down.

"It doesn't even cover the money spent on the formula, let alone what we've spent on medication," Guo said.