The group Aussie Farms, which broke into Nhill's Luv-a-Duck in November, has confirmed it has plans for a protest on April 8, to mark the first anniversary of its anti-farming film Dominion.

In January, the activist group also published a map with the contact details of farms across Australia, which it claimed showed "factory farms, slaughterhouses and other animal exploitation facilities".

Related: Aussie Farms come under federal government's tough new privacy laws

Daniel, whose Nhill poultry farm is on the map, said worries about activists on his property was taking a toll on farmers' mental health.

"Myself and my brother have a couple of farms, and we're up at 5 am each day driving around the sheds to make sure everything is intact and looking for cameras that might be planted in the sheds," he said.

"That sort of stuff wears you down, and we'd rather be concentrating on growing our birds to the best of our ability and sticking to animal welfare rules. They just break in with no thought for biosecurity. I've also got concerns for my young family that lives on the farm."

Daniel asked not to have his full name printed for fear of being targeted. He said he was concerned about what would happen if himself and other isolated farmers if protesters confronted them.

"I wonder where this is going to end: I've spoken to a few other farmers, and we are worried maybe one day something bad is going to happen," he said.

President David Jochinke, of Murra Warra, said Aussie Farms had been asking people to muster at certain points on Monday.

"We know they've been asking people to be prepared to travel to farms and enter property and make demonstrations," he said.

Mr Jochinke said he had heard of farms in the Wimmera organising themselves for activist groups at their properties.

"They are trying to be prepared to capture as much footage as possible and call for immediate assistance to look after the animals that may potentially be threatened," he said.

Luv-a-Duck CEO Daryl Bussell said the company had upgraded security around its processing plant since 55 activists broke in on Thursday, November 29, and removed ducks from the business to allow them to swim.

"We have a perimeter fence around our site now, so access is much more difficult and obviously it's a visual deterrent," he said.

Other farming bodies have urged their members to keep records of audits, staff training and biosecurity procedures up to date, and to vet new staff applicants.

Mr Jochinke said legislation and the justice system had not been able to keep up with increasing activism.

"We've reached out to the deputy commissioner of police to discuss how we would like to see police discharge their duties when dealing with trespassers on farms," he said.

"But our real issue is magistrates haven't been prosecuting the legislation: Police have brought a few cases to court, and the law hasn't delivered justice, and it's probably mandated these activists' actions."

Last month, an activist who stole a goat from a Gippsland cafe was fined $2 for breaking biosecurity laws and housing livestock without a property identification code.

In February, the Nationals moved a motion in state parliament calling on the government to tighten trespassing penalties to protect farmers. The office of Member for Lowan Emma Kealy said that motion is likely to be debated when parliament resumes next month.

Victorian Minister for Agriculture Jaclyn Symes told the Mail-Times there were several existing laws that dealt with trespassing, with penalties of up to six months imprisonment.

"I will always back farmers and their rights to get on with their job without fear or intimidation," she said.

"Breaking the law in the name of animal activism is unacceptable and puts at risk the very animals the activists say they are trying to protect."