I goofed up and lost track of which of my goslings are ganders. I have 7 embdens, 3 are definitely female and 4 were straight run and one of them looked like it was maybe female but the color kind of in between male/female. They are 5 weeks old no so theres no way to color sex them. Ive read that once they start growing its better to wait til they are mature to vent sex them, is that true? Also ive read mixed things on whether or not too many ganders is bad. I was going to let them grow out together for a while and then cull one or two ganders depending on if that one straight run is actually a female. Am I asking for trouble by doing that?