>>281182756
>>281183289
>>281183393
https://en.wikipedia.org/wiki/Domesticated_silver_fox
>As reported on by Trut, the tests for tameness took the following form, which was still in use as of 2009: "When a cub is one month old, an experimenter offers it food from his hand while trying to stroke and handle the cub. The cubs are tested twice, once in a cage and once while moving freely with other cubs in an enclosure, where they can choose to make contact either with the human experimenter or with another cub. The test is repeated monthly until the cubs are six or seven months old." At the age of seven or eight months, the cubs are given a tameness score and placed in one of three groups. The least domesticated are in Class III; those that allow humans to pet and handle them, but that do not respond to contact with friendliness, are in Class II; the ones that are friendly with humans are in Class I. After only six generations, Belyayev and his team had to add a higher category, Class IE, the "domesticated elite", which "are eager to establish human contact, whimpering to attract attention and sniffing and licking experimenters like dogs. They start displaying this kind of behavior before they are one month old. By the 20th generation 35% were 'elite', and by the 30th generation 70% to 80% of the selected generation was 'elite'.

>Once the foxes in each generation had been classified according to the latest research, only the least fearful and least aggressive foxes were selected for breeding. Goldman said, "In each successive generation, less than 20 percent of individuals were allowed to breed". The sole criterion for permitting them to breed was their tolerance of human contact

It should be possible to create demons that are friendly to humans but it is gona be 300 year project with multiple generations of selective beeding of demons.

You are gona need hundreds of wizards, schoolars, scientist and thousand guards and one massive facility for it.