Circe used poisoned food to turn them into pigs.
In the land of Circe, Odysseus and his men face the danger of being turned into animals by the sorceress. Circe uses her magic to transform them into swine after they consume her enchanted food. However, with the help of Hermes, who provides him with a protective herb called moly, Odysseus is able to resist her magic and ultimately persuades Circe to restore his men to their human forms. They then spend a year on her island before resuming their journey home.
To the land of death
found there home land
they travel to another
She sends him to the land of the dead to talk with Tireasais
Eurylochus did not obey to the orders of Odysseus and when Odysseus brought back his colleagues from the palace of Circe they almost had a fight
The land of the deads
He returns back to Circe's island (Aeaea).
Well Odysseus had to stay a year with her for the enchantment to break and then the men were restored from pigs to men. Then Circe tells them the profecy that leads them to the land of the dead.
Calypso and Circe
In Homer's Odyssey, Odysseus and his men spend one whole year with Circe. In some movie versions: Seven years. In the place of Circe, time is slow but in the outside or real world time is quick. seven days in her land is seven years in the real world.