An expert on animal nutrition on Sunday dismissed a Web report that said chickens used by KFC and McDonald's "grow too fast".
Ce.cn, an economic news website, claimed birds at Suhai Group, a large processing company in Shanxi province, grow to full size in 45 days.
In the report on Friday, unnamed workers were quoted as saying they are made to feed the chickens additives and medicine that are "hazardous to humans", and said the company supplies large supermarkets as well as KFC and McDonald's.
However, Hou Shuisheng, an animal nutrition professor with the Chinese Academy of Agricultural Sciences, told China Daily that such a growth rate is perfectly safe and simply the result of successful animal husbandry.
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