Currently the RSPCA warns farmers about impending inspections.

But association members will consider asking the Government to allow unannounced inspections under the draft Animal Welfare Bill, which is before Parliament.

The RSPCA's executive director, Dr Mark Peters, says the proposal has to be approved by the association's council before it begins pushing for the change.

"The RSPCA are very well aware of the concern of the community about intensive farming practices, but we are also very well aware of the legitimate concerns farmers have about the introduction of disease on their farm," he said.

Marrabel farmer and RSPCA member Ian Rowett says surprise inspections will do more harm than good.

He says farmers need some notice that other people will be coming onto their farm and near animals.