Out of my first setting of eggs, only 1 hatched, so now I have a very lonely duckling, and have not been able to find it a friend. It will be 3 weeks old on monday. Now I have 3 eggs in the incubator and 3 more under a broody hen. The bator eggs are due to hatch in a week and a half, and the hen ones a bit more than a week after that. I know that with chickens you have to wait until everyone is close to the same size or the big ones can kill the little ones. Is it the same for ducks? I so want my ducky to have a friend, but of course I also want them all to be safe. When can I safely introduce them? How?