I currently have 4 ducklings roughly 5-6 weeks old, almost positive I ended up with 4 boys anyway my sister in law just contacted me that her boss has 7 ducklings she needs go get rid of and thinks they are 2-4 weeks old. I was going to see if we could determine sex on any of them to bring some females into the coop. Will it be okay to mix the 2 ages? Will adding females this young cause and issue? My goal is to try to eliminate an issue of me adding females next year or having to part with 1-3 of my males. I dont have the space to add 16 females to keep a good ratio and I'm really attached to the guys already!