Bill,
We hydrate our pellets immediately before use each time, so any mold issue would have to be present in the dry food. How would one identify mold in dry pellets? It's not readily visible and I don't think the pellets smell weird, and I don't think the pellets have gotten wet; at the hatchery, they were stored in plastic on a pallet and our bags came from the top, and at our place they've been stored in a plastic storage container (a strictly dry bowl is used to scoop pellets).
Thanks for the comments on likely causes of the mortalities. I imagined that the deaths in the first week or so were from stocking/handling stress, but it just worried me to see another dead one after 3 weeks. I'll report back on YP mortalities later on when I see if this is an ongoing trend, or just a freak incident.
