My first thought was that they're both males.
But what skip said.
They could be sick, you could have cleaned with bleach and fried their brains, it could be too hot, or any number of issues. Tell us EXACTLY how it/they are being kept and we might be able to come up with something better than 'see a vet'. At the end of the day, you might want/need to see a vet though.
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