By Julie V
Date 11.05.05 15:52 UTC
The risk of ear and eye deformities is only significant when harls and merles are bred together or each other. Don't know if Dane breeders routinely BAER test but there is a risk of deafness with harls anyway as the gene for harl (acting on merle) reduces the amount of pigment.
When harls and merles are bred together there is a 25% risk of producing homozygous merle with high risk of all the associated problems. I didn't think this was normal practice in Danes as harls can be bred much more safely by breeding harl to black or mantle "carrying" harl, to produce harls at 25% probability, the same as harl/merle breeding. There is always a high risk of mismarks in harl breeding as it is trying to match two heterozygous genes together.
Julie