We’ve been raising mice for about 3 years (currently am down to 7 colonies over the winter) and I actually prefer to keep the 1:3 ratio. Despite all of the reports on the internet, we keep the male in with females and we’ve never had a case of him eating the babies - our males actually help out the mothers quite a bit.
I pick clean the cages every 2 or 3 days and do a major cleaning once per very 5-7 days week have not had any issues with odors.
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