A parliamentary inquiry examining the actions and role of the RSPCA in WA looks set to go ahead after it was backed by the State Government.

While a vote on the motion to hold an inquiry into the animal welfare group is yet to be held, Agriculture Minister Ken Baston told Parliament he supported the idea.

The motion was put forward by Shooters and Fishers MP Rick Mazza, who said there was a lack of oversight into the RSPCA's use of government funding and unique legislative powers that give it the capability to prosecute people over animal welfare complaints.

Mr Mazza's proposed inquiry would examine the use of those powers and funding and the organisation's objectives.

The RSPCA receives $500,000 from the State Government annually to help it meet the costs of its animal welfare inspectorate role.

Mr Baston said he agreed with some of Mr Mazza's concerns, taking a swipe at the RSPCA in his speech to Parliament on the motion.

"In a sense they've behaved like a political lobby group over [the RSPCA's opposition to the live export trade] and some other issues," Mr Baston said.

"They've taken a philosophical and political position that is at odds with both the state and federal governments.

"Where a body has such an important role to play, specifically where they're appointed as inspectors with duties around compliance and enforcement, they should be guided by science and firm policy - not ideological leanings.

"I have received feedback from members of the public that would appear to indicate there's been some issues around the RSPCA's prosecution of their powers."

RSCPA scrutiny needed: Agriculture Minister

Mr Baston said he was unconvinced there was enough scrutiny of the RSPCA.

"The absence of [enough checks and balances] does not ensure the best outcomes will be achieved, either for the state or the RSPCA," he said.

"Where the Government funds a body to undertake the responsibilities, there must be careful scrutiny - there must be checks and balances."

The RSPCA has repeatedly rejected claims of a lack of accountability, saying last month that the calls for an inquiry were politically motivated and driven by people with "an axe to grind".

They speculated whether it was connected to the RSPCA's opposition to Mr Mazza's proposal to allow controlled recreational hunting on some public lands in WA.

Both Labor and the Greens have also strongly opposed the call for an inquiry, with the Opposition describing it as "an outrageous attack".

"I find it objectionable that the Parliament conduct an inquiry into whether a not-for-profit, community-based organisation has got the right objectives," Labor's leader in the Legislative Council, Sue Ellery, said.

"That's for the organisation to determine, it's not for the Parliament to determine that."