The Pastoralists and Graziers Association says if there is not more rain soon, farmers may be forced to sell some of their stock.
Short of a deluge today, Perth and surrounding areas are on track to record their driest July since records began more than a century ago.
The city has had 2.4 millimetres of rain so far today to take the total this month to just over 32 millimetres, well below the 170 millimetre average.
The coastal city of Mandurah has had 25 millimetres this morning.
Bunbury has had 7 millimetres but there have been no recorded falls in the Great Southern or Wheatbelt.
The PGA's Rob Gillam says he is hoping for more rain over coming days.
"If we don't get enough pasture, people will continue to hand feed, but they'll also begin to have to make decisions about offloading some stock because you do have to have a certain about of dry stock going into summer," he said.
"If you haven't got the feed on your property then you have to sell some.
"Stock feed everywhere through-out the state is very, very short because it's been so cold, until it starts to warm up and the warmth will come with the wet weather hopefully.
"If it doesn't rain in the next two or three weeks there will be people who become very worried about the yield potential of their crops."
The Water Corporation says both desalination plants have been running at full capacity to make up the shortfall.
The corporation's Ben Jarvis says the utility can no longer rely on rain to top up water supplies.
"Unfortunately, so far this year we've only had 5 billion litres of inflow," he said.
"We used to, prior to the mid-1970s, average about 400 billion litres a year.
"5 billion litres is only enough to supply 5 summer days and then it's gone."
Perth's two desalination plants have been working at full capacity this winter to make up for the shortfall in rain.
© ABC 2012
16:53 EST The first shipment of sugar to leave the Port of Bundaberg since floods devastated south-east Queensland in January is setting sail this afternoon.