Victorian landholders will join graziers and politicians from South Australia in consulting New York lawyers in a bid to ramp up the fight against coal seam gas (CSG) operations.

More than 100 people descended on a property at North Byaduk in Victoria's south-west on Sunday to declare their intention to keep the region free of gas fields.

South Australian grazier David Smith, who spoke at the event, said primary producers in his state had banded together to voice their opposition.

He said they would travel to New York next month to explore their legal options.

Travelling with them will be a trio of South Australian politicians - Mount Gambier MP Troy Bell, State Greens leader Mark Parnell and Independent Upper House MP John Darley.

"It started when I began speaking to producers in the US, and they told me that the fracking chemicals came up into the groundwater that the stock were drinking and killed some of their calves, two horses and some sheep," Mr Smith said.

"In another instance, bulls and heifers had gone blind, and they ended up losing a lot of stock.

"So we're going to be speaking with lawyers in New York involved with fracking court actions, and looking at what options we have.

"Then we're travelling up to Scranton to go on a gas rig.

"We'll be meeting with gas companies and sitting down with them to get both sides of the story."

Byaduk farmer and declaration organiser Aggie Stevenson said landholders from across south-western Victoria had serious concerns about the level of community consultation involved in CSG licensing.

"The one here, no-one in the community knew that an exploration permit had been granted by the State Government.

"If the moratorium is lifted and the State Government gives a green light to the mining companies, that's when we'll go into the next gear and look at what we can do.

"We just hope the Victorian Government will listen."