Westland Milk Products cut its predicted payout range from $6.50-$6.90 to $6.10-$6.50 this week on the back of the decline in global prices for dairy commodities.
In a statement, chairman Pete Morrison said the factors driving the revision were largely out of Westland's control, involving international market forces and an increasing abundance of milk supply globally.
Indications were the co-operative would come in about the middle of that range.
While it would not be news shareholders wanted to hear, it was better they were prepared now and budgeted accordingly, he said.
Some internal factors were also influencing the payout. Ironically, there had been a very good start to the season. However, the build-up to peak milk period was higher than predicted and lasting longer.