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Sad and shocking to find two dead like that, I know. 25C is at the high end of what I would consider an acceptable range of temps for meeces. The only thing I can think of is some food or water problem; crud grows faster at higher temps. I try not to leave any raw food in the tanks when it's warm, and water can look and smell fine but still harbor nasty microbes.
The only other thing that comes to mind is exposure to some sort of toxin, i.e. the sort of thing that happens by accident, like overheating a nonstick pan, one of the older kinds, and that releases substane that is fatal to some kinds or birds, and might be to meeces as well. Sensitivity to airborne chemicals can vary a lot from one mousie to the next for a lot of different reasons. Or maybe there was a loud noise or disturbance in the vicinity and they die of a seizure/fright. I've had meeces that seized up when I turned on the light in the mousery, or opened their cage. Needless to say, I try not ot breed from lines that show that kind of problem.
The only other thing that comes to mind is exposure to some sort of toxin, i.e. the sort of thing that happens by accident, like overheating a nonstick pan, one of the older kinds, and that releases substane that is fatal to some kinds or birds, and might be to meeces as well. Sensitivity to airborne chemicals can vary a lot from one mousie to the next for a lot of different reasons. Or maybe there was a loud noise or disturbance in the vicinity and they die of a seizure/fright. I've had meeces that seized up when I turned on the light in the mousery, or opened their cage. Needless to say, I try not ot breed from lines that show that kind of problem.
