To stop the spread of bird flu, the hens have been quarantined since last autumn.
This has applied to everything from hobby chickens to large facilities.
But a week ago, the level of protection was lowered and the hobby chickens were allowed to be released.
Low risk of people being affected
In Kazakhstan, seven people contracted bird flu with mild symptoms.
SVT Nyheter has spoken with the chief veterinarian at Jordbruksveket, Håkan Henriksson, who talks about the low risk that this type of bird flu infects people.
In the video, you get to see when the chickens on Torekällberget are released for the day.