I think the OP is a conflation of Ivanov's work to create human-chimpanzee hybrids with reports of Nazi dog schools.
At least one dog training school was set up in Nazi Germany, to work with what they believed were hidden innate talents of dogs - speech, cognition, math, and even psychic abilities.
It was reported that one dog, Rolf, "read the newspaper, wrote poetry and wrote his autobiography. He also led an extensive correspondence with many known and unknown people, which was later published under the title 'Briefwechsel eines Hundes'. Rolf was interested in the questions of religion and ethics, he mused about the soul of the universe, he argued with priests in Latin, and was also interested in politics." (translated from German
, p. 98, third paragraph).
Remember, you can't spell ROTFL without R-O-L-F.