John Fairley made the appeal on Facebook as his 130-strong herd of dairy cattle in Picton face a winter with a shortage of feed because of the drought ravaging the greater Sydney region.
"Even if it rains next week and I get crops in, we are not going to get much growth because we get no daylight or warmth," Mr Fairley told ABC radio on Tuesday.
Mr Fairley has taken to social media and asked the public for help in what he has estimated will cost $AU1350 to feed just one cow until spring.
"The time has come to swallow my pride and ask for help," Mr Fairley wrote on Facebook
"My 83-year-old dad said he has never seen it worse than this."
People can donate however much money they want but for a minimum of $AU135 they get a tour of the Picton farm, meet Mr Fairley, and milk their adopted cow, as well as buying feed for the herd.
For those who adopt a cow or a calf at the full cost of $AU1350 they get naming rights and a photo of their cow. There is also the opportunity to form a cow syndicate.
Mr Fairley said he got the idea from an episode on the US sitcom Seinfeld, when star actor Kramer adopts part of a highway and repaints four of its lanes into two to make it "more luxurious", causing mass confusion and traffic congestion.
Mr Fairley's family farm, Country Valley, bottles its own milk, cream and yoghurt, and also donates some of their dairy products to the local schools for childrens' breakfasts.
