So I came downstairs to check on the rats this morning, and out of 15 babies in one tub with one mother, 12 were dead, and 3 looked sickly. The mother was albino and had red on her nose and red all over her paws and looked sickly. The babies were alive and healthy just yesterday (these are ~ 2 weeks old, eyes not quite opening). None of the babies were bit, bleeding, or anything, just dead... 12 at once...
Very weird... any ideas? Mothers and babies are in Aspen only, with water and standard lab blocks, nothing different there....






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.That is very weird though that one day they are ok then dead the next.Keep notes on this female and if her next litter has this happen i would suggest replacing her.