Another New Zealand dairy company has found traces of the agricultural chemical DCD in its milk products.
Westland Milk Products commissioned tests through an independent laboratory after the compound was found in some Fonterra products.
The chemical is contained in some fertilisers and can be ingested by dairy cows. Officials said it had been found in low levels in Fonterra milk, 100 times below the European standard.
Westland Chief executive Rod Quin said minute traces of DCD were found in its samples produced before November last year, but they do not pose health risks.
He said some customers in Asia have already requested further tests be carried out and they will report the results to customers as soon as possible.