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Merle Study

Questionaire on Merle


Do you have a dog in which the merle-gene is present and was tested for it? Then we’d like you to participate in this survey, both with your merle and your non-merle dogs.

With this survey, we aim to collect data to determine the frequencies of impairments in merle and non-merle dogs, and in particular the incidences in the different merle-alleles and their combinations.

You will need the chip number (or the offered encryption code) of your dog and the results of the M-locus. As far as available, we are happy to receive results of eye and ear (BAER) examinations and laboratory results of the D- and S-locus.

The questionnaire takes about 15 minutes to be completed (if the above data are at hand). Please fill it out for each dog individually.

At the end of the survey, we ask you to upload one picture each from the right and left sides of your dog’s body and from the front of the head (up to 1MB). The images are very important for assessing the merle patterns and possible white, especially in the head area.

Thank you very much for your participation. By doing so, you are actively helping to create knowledge!

If you have any questions or suggestions for improvement, please feel free to contact us via eMail:


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