Ok I'm impatient so candled the eggs my children put in and saw development in at least 7. I candled the lighter coloured eggs real good and removed all the clear ones and will check back on the rest in a few more days. Broody Bella is also living up to her name so I have decided I'll be leaving her with some eggs from the hens who also laid the fertile eggs in my incubator, so hopefully she will be a mum again