Sad news from the mice colony...
My super prego momma died during the night. Absolutely no idea why. She was fine when I fed them last night, but when I went to check on her today I found her dead. She was carrying our first litter. Bummer!

Tell me if this sound stupid...
I had separated her from the others (1M-4F) and had her in an enclosure of her own because I didn't know if the other mice would bother her, with her being so close to delivery. So I separated her and she was alone. Could this have had anything to do with it? It's the only thing we can think of.