Thank you M for the link. Through my research on CC I have not found that interview. It is a very early one, one can tell on the style and later I see that it was made in 1972. He is still much in sorcery -magic talk and not yet in the Toltec lineage and more structured. And then comes this little story about his Nagual animal that I like so much:
"We might be able to talk to any animal. For don Juan and the other sorcerers there wasn't anything unusual about my conversation with the coyote. As a matter of fact they said I should have gotten a more reliable animal for a friend. Coyotes are tricksters and are not to be trusted."