Biscuit, Ginger, Little Tip and Big Tip are due to be released into the wild.Read more
The pair has been widely photographed frequenting a college's grounds.
A fox had to be rescued by the RSPCA after she got her head stuck in a fence panel in Hemel Hempstead.
The animal charity said it had "no idea" how long the vixen had been there as the woman who lived there returned from holiday to find her stuck in the corner of her garden.
Grace Mead from the RSPCA attended the scene on Wednesday and released her.
"We suspect this little vixen had tried to jump over the fence but didn’t quite make it and slid down between the posts getting her head well and truly stuck," she said.
The fox was taken to a nearby wildlife hospital for treatment as welfare officers were concerned about swelling around its head and neck.