I believe they have the facility at UC Davis do their DNA testing.
For the couple times I've visited, the staff is adamantly against the idea of owning any kind of hybrid. Considering that, I'm pretty sure they won't be willing to contribute directly or indirectly to owning or proving the quality of a wolf hybrid. I mean that's just my thoughts on the matter. I think you better direct your question to a animal vet.
You should direct this inquiry to WH, not to the general public.
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