During a visit to Dubbo last week, Mr McCormack again unloaded on PETA.

The global organisation caused a furore in mid-May when suggesting farmers battling the mice plague should catch and release them unharmed.

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At the Royal Flying Doctor Service Dubbo base on Friday morning, Mr McCormack was asked if the NSW government had done enough to address the plague.

"Yes, at the moment, but of course these rodents are in plague proportions and I know Adam Marshall has worked very hard in conjunction with NSW Farmers in conjunction with people in his own electorate," Mr McCormack said.

The Deputy Prime Minister said "a warm wet summer and plentiful grain" had been conducive to a mice plague.

"And then we have people such as those from PETA .. coming and saying they should be rehomed," he said.

Mr McCormack said the people saying "such ridiculous things" should take the mice "into their homes, into their backyards, into their living rooms, into their pantries so that they can gnaw at their food at night, so they they can scratch their children, so they can eat through the cabling of their computers and their air-conditioning systems".

"Country people don't need to be told by city people how to live their lives," he said.

"City people need to know that country people grow their food and fibre and they run this country, they protect this country and certainly they're going to be the people who are going to lead us through the recovery period out of COVID-19."

Mr McCormack came to Dubbo to announce the Royal Flying Doctor Service would administer the COVID-19 jab in Australia's rural and remote communities.

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