A small detail on the packaging of a popular brand of eggs opens a window on the actual living conditions of some free range chickens.

The detail was spotted on the side of a carton of Manning Valley Free Range Eggs by a customer who shared her discovery on TikTok.

Written inconspicuously on the carton is a message telling consumers that some of the chickens can be viewed mingling in a field at Manning Valley farm, on the NSW North Coast, online via a live webcam.

“This is amazing,” the woman wrote. “I’ve legit just sat here for the last 25 minutes of my lunch break at work watching these chickens."

More than 350,000 people viewed her clip in less than a day, with more than 800 people leaving comments.

“If you can’t see what’s happening inside a farm they have something to hide, 100 per cent support this,” said one.

“What! And Aussie! Off to find this brand, worth it! Such a cool and appreciated marketing point,” another wrote.

“This is such an awesome idea. I hope more farms and companies decide to be so transparent,” said a fourth.

Some were more sceptical and said there may be other chickens subject to harsher conditions than those shown on the webcam.

Do you buy free range? Are you confident the chickens really are free range?