Hi Troy, sorry your experience with mice is more about your husbandry then the mice.



I have been producing mice for many many years. We are producing about 5 to 6000 a week.



Never seen an sterile male or found a need to use several males. We also do not see cannibilism. And we have no problem adding or changing individuals in groups.



We set up aprox 200 new breeders a week and never have a problem with fertility or breeding. They cycle every 23 days and don't miss unless I screw up.



Simply put, you cannot miss, not a day with food or water.



If cared for, small colonies, or large ones(1.3 up to 1.10) are not a problem. Ours are 1.7 in most cages with one row of 1.9.(slighly larger cages)



I would look into your husbandry if your seeing the problems you mentioned. Also, do make me the bad guy, we all learn to support our animals, some how, some way. Its a process. Cheers

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