Update: It’s the next morning and I can still see a few left!! There are at least 5 from what I can see and they all have full milk bellies so I know she’s feeding them. I really want to cull the males early on so as to cut down competition & let the females get larger, but there’s no way I’m going to try and touch them now. How many days should I wait before touching them (obviously removing the adults first)? I have latex gloves that I usually use for handling neonates but I’m still super nervous. I think she may have just been culling the litter to a manageable size but it seems small for that, so I’m really at a loss here.

To answer the diet/housing question, they’re in a 10g with lots of hides and enrichment and are fed Mazuri with supplementation. This is what the breeder I got them from fed them so I’ve just stuck to it and they’ve thrived. The food is pretty high in protein even for breeding mice (~21%) so I don’t think that’s the problem.

Fortunately, the other mice seem to be helping as I’ve witnessed one other female as well as my buck “babysitting” the jellybeans.