I watched Turkey version of this movie from a very old VHS cassette that was discovered, after the death of either Turkish co-producer or co-director, by a garbage collector in a pile of tapes and documents in front of his house. A second-hand bookseller pointed them to me.
The film was re-edited by co-director Yilmaz Duru and just 78 minutes. It seems that those other 9 minutes was very gory for the eyes of Turkish co-producer Tugra Film and they decided to chop that footage. There were neither "yanking the guts out of a dead puppy" by Kinski nor his "spending a lot of time running wild through the woods". He was more of a decent but passionate guy, anyway he was spooky.
There were some inconsistencies during the film, or better some long jumps in the narration. After the professor's henchman buries Daniel out somewhere in the garden, then all of a sudden in the next scene we see Daniel trying to free from sarcophagus in the cellar. And the film finishes right after Daniel runs out the manor through the woods and collapses crying on the grasses.
The film is also one of the attempts by the Turkish actor Ayhan Isik, who died relatively early and was very famous and loved in his home country, to expand abroad through European co-productions. Henchman Erol Tas was also among the popular Turkish supporting actors of his time, frequently portraying the villain.