A second decapitated cat has been found in Adelaide in the past two weeks, prompting the RSPCA to warn pet owners in the north-eastern suburbs to keep their animals contained on their properties.

Key points: The body of a black male cat is found in a playground in Golden Grove

The body of a black male cat is found in a playground in Golden Grove A ginger and white cat was found decapitated in a backyard last week

A ginger and white cat was found decapitated in a backyard last week The RSPCA urges cat and pet owners to make sure their pets are safe

A couple walking their dog found the small black cat at a playground on Chatswood Grove in Golden Grove on Friday.

It comes as another decapitated cat was found in a Wynn Vale backyard last week, only about four kilometres away.

RSPCA South Australia chief inspector Andrea Lewis said there were no strong leads to identify who was responsible, but it could be the same person.

Loading

"We certainly can't rule it out, it is a very similar type of offence in a very similar type of situation," she told the ABC.

"The wound itself is quite similar to the unfortunate case of Bear, the cat that was found last week."

The RSPCA called for anyone who is missing a cat matching the description, as no microchip could be located on the cat's body.

The owner of the first cat, a long-haired ginger and white cat called Bear, only learnt of the fate of her pet after seeing a post on social media.

She said her cat had only been missing for a few days and did not usually wander far from their Para Hills home.

The second find has prompted a warning from RSPCA South Australia for all cat owners to contain their pets to their properties.

In particular, Ms Lewis urged cat owners in the north-eastern suburbs of Adelaide to be vigilant.

"We would be asking people to consider how they're containing their animals to make sure they're safe," she said.

"Cats and pets are very vulnerable if they're able to wander without supervision.

"Having two very similar incidents in the same sort of area, over a two-week period is certainly very suspicious."

'The person may be insane'

Criminal psychologist Tim Watson-Munro has been analysing the minds of some of the worst criminals of our times for the past four decades.

He said if the same person was responsible for both decapitations then the person may be insane or psychopathic.

Criminal psychologist Tim Watson-Munro shared his views on the person responsible. ( Supplied )

"It's a possibility of two things. The person may be insane — that is psychotic and mad — or alternatively they're very bad and psychopathic," he told the ABC.

"The fact that there's been two cats in a very brief period of time in the same district tends to suggest maybe this person is reasonably well-organised — which would mitigate against them being crazy, it's more likely that they're highly disturbed."

He said cruelty to animals was a sign of potential violent behaviour and the person responsible was "clearly sadistic".

"I'm not saying you have a serial killer out there in suburbia, but the fact that you've got two cats in a short period of time, the person is clearly escalating and enjoying notoriety," he said.

"So beyond killing the cats they would enjoy the fact the owners have been traumatised and of course the people who find the cadavers, a shocking crime."

He said in his view it was more likely the person responsible was an adolescent or adult.

"It's a crime of opportunity as much as anything," he said.

"It creates a lot of disgust and repulsion in the broader community and it affects people so it goes way beyond the killing of cats."

'Disturbing, gruesome' thing to do

Ms Lewis described the find as "disturbing" and said she hoped the latest incident would the last.

RSPCA chief inspector Andrea Lewis urged pet owners to be vigilant. ( Supplied: RSPCA )

"They're very disturbing, it's a gruesome thing for people to have had to of found and report," she said.

"We're certainly concerned that there may be someone out there that's finding this sort of thing amusing … I'm sure the owners of these cats would be devastated.

"At this stage we don't believe any other animals have been involved and we certainly hope this is the end of this sort of thing happening."

Anyone convicted of an aggravated animal cruelty offence could face a penalty of $50,000 or four years in prison.

Anyone with information has been urged to contact RSPCA on 1300 477 722.