Do these males live together? Where do they live? What bedding are you using with them? I'm thinking either biting the bars (if they are in a cage) or allergies to the bedding. It can happen that a gerbil is allergic to aspen or carefresh... so it's not a matter of "this bedding is good, this is bad". I suggest that, if they are in a cage, change them to a tank where they have nothing metal to chew, and change the bedding to paper towels or unscented toilet paper. Other problem could be mites, they can get them from the bedding or the hay if you give them, but then the others would probably have them too if they are getting the same stuff. Taking them to the vet is a good idea, since he can check for mites and that sort of stuff or tell you if it's an allergy. Good luck with them.
Vanilla rat, as far as your babies go, the vet probably wouldn't be able to do anything for them. I don't know exactly what gene caused that in your mice, but I know that in campbells dwarf hamsters there is a gene that, when the hamsters are homozigotes, they are born white, smaller, without eyes and without teeth. They grow alright till they are weaned, then they die of starvation cause they can't eat. It does sound like it was the same with your mice.
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