I haven't done anything at all except to open it up and add water and do the candling but you're right if I start messing around with anything then I'll surely kill them. I know so far I'm doing well since I have exactly the number I need for everyone to get their ducklings who ordered them, I need 8 of them if possible and I have 8 knowing how Welsh Harlequin's can be with the fertilization and hatching rate. I figured if I put a dozen in I would get 8 - 9 growing and I have 8. I'm just worried about the lockdown and the humidity going up too high or not high enough.