LIKE a photo of a naked girl?

Then People for the Ethical Treatment of Animals - Australian wool growers' harshest critic - has just the thing for you: a free picture of model Vida Guerra naked for each donation of more than $5, The Weekly Times said.

"Vida Guerra wants you to join her in helping to put a stop to cruelty to animals," PETA's website said.

"Any donation over $5 will receive a thank-you email with a full picture of Vida's spicy new ad."

The ad is promoted as a "full new naked ad!"

It comes as doubts have been raised over whether protesters at the recent L'Oreal Melbourne Fashion Festival were actually paid models.

The protesters appeared at a wool function wearing only heart-shaped placards slamming mulesing.

One read "Compassion is the fashion - No mulesed wool" while the other said "Have a heart - stop mulesing".

PETA spokeswoman Maya Linden denied the women were paid models.

Calls to a number supplied for one of the women went unanswered. "(The Australian wool industry) can expect increased pressure from PETA and the general public," Ms Linden said.

In the past the organisation has used Australian models Imogen Bailey and Dani Lugosi and US porn star Jenna Jameson in naked campaigns for animal rights.

Ms Bailey's management said she had appeared free of charge, while Ms Lugosi also said her work was "voluntary".

Has PETA gone to far? Vote and have your say at The Weekly Times.

Originally published as PETA peddles porn with $5 naked picture