Roast chicken with cockroach stuffing, a dead mouse tossed with salad, chocolate-flavoured maggot muffins and mouldy hot cross buns are usually not on the grocery list.

But angry Australian shoppers have taken to Coles and Woolworths' Facebook pages to post photographs and show their disgust over their recent supermarket purchases.

A shopper has shamed supermarket giant Woolworths after an apparent discovery of a dead mouse inside her 'washed & ready to eat' baby spinach bag over the weekend.

The woman served up a horrid image of the unappetising salad on the retailer's social media page.

The alarming image shows a dead rodent covered in a spinach leaf, accompanied with the comment: 'Just opened a bag of your baby spinach and this is what fell out'.

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A shopper has shamed supermarket giant Woolworths on social media after an apparent discovery of a dead mouse inside her 'washed & ready to eat' spinach bag

Shoppers took to Coles and Woolworths' Facebook pages to show their disgust over their recent purchases

A Woolworths spokesperson told Daily Mail Australia: 'As we have rigorous food safety and quality standards we are very concerned to have received this customer complaint.

'We have made contact with our customer and will be making further contact with them as a full investigation with our Australian supplier is under way.'

And the disturbing allegation was not the only complaint found on the page, with many also slamming the supermarket giant's rivalry Coles on Facebook.

Insect-infested salads, mouldy fruits and rotten vegetables were some of the other stomach-churning photos emerging across the two retailers.

An angry Coles customer, who allegedly found a dead cockroach inside her roast chicken, claimed she was given a measly $2 voucher after complaining to her local store.

'This is my roast chook dinner, came complete with cockroach inside. Returned the chook and received a $2 voucher!,' she claimed.

'How insulting Coles. I did get my $8 refund of the offer of a new chook. No thanks Seriously [sic] an issue for the department of health?'

Following the complaint, the supermarket responded: 'We’re very sorry for the unpleasant discovery and we do appreciate the opportunity to look into this further.

'If you happen to have the ticket from the chicken, or a photo of it, the details from that ticket would be very helpful.'

Daily Mail Australia has contacted Coles for further comment.

One woman, who allegedly found a dead cockroach inside her roast chicken, was given a $2 voucher after she complained to the supermarket giant

Maggots were allegedly found inside a muffin that was purchased from the bakery section of Woolworths

A shopper allegedly found fly 'eggs' on one of the leaves from a salad bag she purchased from Woolworths

A Coles shopper found dark moulds in her Danish feta despite the use by date on the packaging

A Woolworths customer claims he found moulds all over his fruit hot cross buns

One angry Woolworths customer allegedly discovered her mangoes were rotten after cutting them up

Rotten fruits and vegetables, mouldy breads, wraps and cheese were among the common complaints being bombarded through the feeds every day.

One Coles customer revealed she had purchased a bag of 'washed & ready to eat' baby rocket, only to allegedly find a dead moth among her leaves.

'I think your packets of baby rocket needs to be thoroughly washed before packaging!' she claimed.

'I just found this moth looking thing in my salad [sic]. I didn't wash before because the packet says, "Washed & ready to eat"!'

Following the complaint, Coles responded: 'We're concerned to see this and would like the opportunity to have our National Quality team look into this further.'

Other photos ranged from rotten pears and beef ravioli to mouldy beans, asparagus - as well as muesli bars, with many half-consumed before making a shocking discovery.

Common complaints included rotten or mouldy vegetables that were purchased from the supermarket giant

A Coles customer allegedly found a dead moth from the 'washed ready to eat' baby rocket salad bag

Rotten fruits were among one of the most common complaints found on the supermarket giant's page

A Woolworths customer claimed he found a 'baked fly' inside his banana bread, describing it as 'disgusting'

Another woman revealed she had started eating her dip - purchased from Woolworths - when she allegedly found a dead spider in the creamy mixture last Friday.

'So I've just opened my dip.... started eating it & realised there's a dead spider in it! I realise it's only small but it's still disgusting!,' she claimed.

One horrified Woolworths shopper allegedly found fly 'eggs' on one of the leaves from a salad bag.

'I bought a bag of premix leaf lettuce with Beetroot and carrot julienne,' she alleged.

'Tonight I had some for dinner, and less than impressed after eating 90% to see these "eggs" hard on my lettuce....!!!!'

Another shopper was treated to some chocolate muffins filled with maggots after she allegedly purchased them on special from Woolworths.

'Bought these chocolate muffins from the bakery section last night because they were on special. Little did I know special meant they came with works inside,' she claimed.

One angry Coles customer allegedly found mould on her loaf of bread just days before the expiry date

Common complaints found on the supermarket giant's Facebook page included rotten or mouldy fruits

An angry Coles customer vented her frustration after she allegedly found mounds on the pizza bases

A Woolworths shopper revealed she had started eating her dip when she allegedly found a dead spider

One man claimed he opened a 'delicious muesli bar' only to allegedly find the treat covered in moulds

An angry Woolworths customer allegedly found a dead fly inside his Select thinly cut potato chips packet

An angry Coles customer vented her frustration after she allegedly found moulds on the pizza bases.

'I bought these pizza bases on Sunday 24th Jan, and after preparing the topping.. noticed their unsightly, disturbing and frightening mould on all these bases..,' she claimed.

'Not happy Coles! Pizza bases were in date ? Till April 16.'

Coles responded to the complaint, saying: 'Thanks for taking the time out to bring this to our attention. We are sorry to see you’ve encountered this issue with our Coles Pizza Bases.

'During the manufacturing process our products are packed to keep fresh, however if the product is damaged in any way during transportation or storage, oxygen and moisture can enter the pack causing mould to grow.

'In the meantime please feel free to hold onto the packaging or your receipt until your next visit as our team would be happy to offer you a full refund or replacement.'

An angry shopper claimed she allegedly had a bag of 'freshly-bought' mandarins only to find they were rotten

An angry Woolworths customer claimed they found moulds on the retailer's Select brand beef ravioli

Moulds were among one of the most common complaints found on the supermarket giant's Facebook page

Common complaints included rotten or mouldy vegetables that were purchased from the supermarket giant

One angry Woolworths customer allegedly found live maggots in a pre-packaged salad

A woman was shocked to discover she had allegedly tasted mould after mistaking it for icing sugar

One Coles customer was shocked when she allegedly found mould building up inside a jar of jam

A shocked Coles shopper allegedly found mould on his three day old bread over the weekend despite the use by date saying February 2

Another customer ranted her frustration online with an image of the rotten mangoes after cutting into them up last week.

'If you are going to sell produce like this I think you should rethink you [sic] 'fresh food people' approach,' she claimed.

'Unfortunately this is becoming the normal standard for what we buy from you and I won't be buying fruit and veg [sic] from you anymore. So disappointing.'

Woolworths responded: 'We're disappointed to see this and thank you for bringing this to our attention. We are proud to be Australia's fresh food people & work closely with our farmers to get fresh food from our farms to stores as fast as possible.

'For this reason, we've raised your comments with our produce team to ensure that we maintain a high level of food standard.'