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Post by AnonymousMouseOwner on Sun 28 May 2017, 3:30 pm

So, playing this rat breeding game on my computer lately, I've been really into learning about genetics and breeding of rats and mice Laughing

So I've had a question on my mind..

In real life, how do breeders know who's healthy and who's not? It seems like by the time they are old enough to get health issues, so you know who has the issues, they are too old to breed... Just don't know how a breeder knows when their mice are healthy. Not to say mice can't get health issues young, I know they can, but in my research/experience, it usually happens when they are 1-2 years old already.   Confused

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Post by CallaLily on Sun 28 May 2017, 3:47 pm

I think they tend to hang onto the first few generations before they start to adopt out, and even later generations they try to keep track of them even after they've gone to their new homes. Then several generations in they have a better idea of what traits they're carrying over. Just guessing though. Smile

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Post by Peachy on Sun 28 May 2017, 7:21 pm

It's recommended to get breeding stock from other breeders, so a lot of the tracking and selective breeding for health and personality is already done. TFM used to have a database where breeders could enter pedigrees... It was really something to look at!

Anyway, obviously if you were starting with pet shop mice, it wouldn't be easy and would take years of keeping records of who gets sick and who is healthy, who dies when and the cause of death, etc. Not just individual mice, but the health of each litter as a whole so you might have ideas about genetic "defects" that could pop up later. Selecting mice based on temperament, size, perceived immune systems, coat health, line history... There's a lot to be read about selective breeding, give it a go!

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