"When they came I thought they were dead. They were limp and cold. I took the hedgehog young with me and held them over the heat from the stove. I blew on them to warm their bodies up," Solberg said.

Now she has 11 hedgehog young recuperating. She uses a pipette to feed them and they are strong now, scrambling around a rabbit cage at her home.

Solberg has been taking in orphaned hedgehogs for the last four years - the first two on her own initiative, the last two for the Oslo and Akershus Federation for Animal Protection.

After a few weeks of care, food and drink in Solberg's garden, the youngsters are ready to return to the wild. She then puts them out in an open cage in the garden and they can wander off when they feel ready.

The latest 11 came in two groups. The first of five were found alone in Oslo's Holmlia district, the other six were found in a city street after their mother had been run over.

"This one nearly died twice. Several times a day I had to force feed it by pipette, it had to have some calories. Eggedosis (beaten egg and sugar), tepid sugar water and a little cream brought it around again. You can bet we were glad when it started to eat on its own," Solberg said.

Solberg had plenty of experience with the animals - Ulvøya used to be full of hedgehogs but then badgers came to the island. Badgers eat them, and the hedgehog population was drastically reduced until the badgers disappeared again.

Solberg said she can see the difference between male and female, something not readily apparent to the eye under their roughly 6,000 quills.

"The female sits in the middle and sniffs while the male trots around and around. They can keep at it for hours," she said.