With my colony does I've usually gotten litters of 6-9. After the kits starts hopping out of the nest box and eating pellets I make sure to supplement with some oats and hay to prevent issues. I've had 2-3 kits die from each litter at this age. I noticed one had.a little bit of diarrhea so I assume weaning entritis. Since I've done what I've seen recommended to help already I don't know what else to do. This only happens with kits from these two related does as well. Could it be genetic or is there more I should be doing?