jacob 28 Posted February 24, 2007 Report Share Posted February 24, 2007 i was just wondering,if the right type of pure bull blood dies out, how long before putting half crosses, 3/4 breds etc.to each other becomes too weak to have the right sort of litters,will it weaken the mix eventually,will the gene pool need revitalising or can we breed off existing dogs indefinatly ? Quote Link to post
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