Translations:Animal husbandry/77/en
From Vintage Story Wiki
Hares
Hares can eat from a large trough, and can also consume any vegetable items tossed on the ground nearby. Though the Block info HUD will not indicate when they are ready to mate, adult females need to eat 2 portions[1] of food. If an adult male is within 10 blocks[2], she will become pregnant shortly. After a gestation period of 5 days,[3] hares bear litters of 1-4 leverets at a time.[4] Leverets take 336 game-hours to mature,[5] and the females need to wait 2-5 days[6] before they are ready to breed again.
After awhile, the Block info HUD will show that some of the hares are generation 1, i.e. not quite wild anymore. They still flee the player at gen 5, but not at gen 10.