Zebra finches
I had 2 pairs of healthy zebra finches, i provided them with 1 nest and eco-friendly nest materials, they soon hatched 5 eggs and had 4 babies survived out of it, after some time one out of 4 babies just died and was thrown out, now all the babies were almost adult with feathers but still young, they hadn’t started weaning because most of the time thier father feeded them by its mouth even though they were of ahe around 6 to 8 weeks older, but father suddenly died in captivity and than within 2 days young birds died whom he fed, i had not hand feeded young ones ever, what is the cause, i tried feeding last surving baby but its not eating at all, i tried serving him milletsn mix seeds too, also i have not removed the nest so mother, young one and other pair all sleep together in the nest, where am i going wrong, i don’t know did father’s death is cause if all problems or nest or mother not teaching her off springs weaning ?