From Phys.org:

Together with a European team, Senckenberg scientists have presented a new method in the scientific journal BMC Genomics that allows the reliable identification of wolf-dog hybrids on the basis of environmental samples such as feces, hair, or saliva residue. The method has a much higher resolution than conventional methods and is expected to serve as a standard procedure in the future, allowing for comparable detection of hybridization rates across Europe.

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