Depends on the doe's condition, how many litters you want in a year and when you want the kits to be weaned. If you rebreed her now, the kits will likely be weaned at about 4 weeks, as the doe prepares for the new litter. If you wait another 2 weeks, the doe will likely wean them between 4 and 6 weeks and have a little break between litters. There are no "right" answers, just choices. But the doe's condition, IMO, should always be the deciding factor... and you do not have to do the same thing each time.