I produce about 6 thousand mice a week. Heres the deal, first, water, miss a day, and they eat their young, miss a day, and they miss a cycle, of course, missing one day, doesn't always result it that, say 50% of the time. miss two days does.
Miss a day of food, impacts them, Three days and they eat their pinkies, and move on up. until they eat eachother.
Also, rats carry virus's that kill lab mice, Swiss, Ross River, etc. A friend of mine who is a rodent breeder in San Diego, had his mice tested and they carried five types of virus.
When they have this virus, they grow up fine, but die after the first litter, They waste away after giving birth. Brown mice, seem to not be effected by these virus.

They can and do reproduce in a wide range of temps, but I found that 75F or thereabouts is great. Common sense here. high fat diets allow for colder temps, low fat diets allow for higher temps. Mice are easy, but you cannot make mistakes or they die.

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