Pig prices are up by more than 25 per cent this year and have jumped again this week, as a result of a big decline in sow numbers and a lower Australian dollar that is lifting the price of imported pork, according to ABC.

Pig industry consultant, Tony Edwards, says with current high grain prices, producers need to receive at least $3 a kilogram to break even, but that figure could rise as dry weather takes a toll on winter crops.

"If we can maintain a reasonable differential between the cost of production and the market price, then there might be an opportunity for some people to make some more respectable returns on their investment."