That's great. Scan them and wala they're digital! What else would be needed would be the disposition of the animal who got it and did the test breedings and some discussion of who's hands subsequent generations went to that is solid enough to prove it was never out crossed.
Given that you would effectively establish a more pure line of this morph for those who are interested. In the interem all people have to go by is the build of individual animals and even this is highly subjective.
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“Nothing is at last sacred but the integrity of your own mind.” Emmerson
