>>44779
>You know, cows need to be properly inseminated to produce milk.
Its the advantage of "male cows" that they don't need insemination – only proper stimulation… :D

>>44785
>the problem if they both become pigs You need another character to slaughter them.
Not really. There is this incredible invention, called "Jessica 3000". And I heard even of a 5000-model. I can imagine that … (ehm, did I miss something or do they really have no names?) … she would be curios and enthusiastic.

>>44793
>I think things should reset only when they die although in that case it becomes unclear to which point they reset.
And another question would be, if they both have to die or the whole village or only the people involved in the ongoing event or in the surrounding of the barn or, or, or. How about the mechanism in Forever:
>Each time he dies, Henry disappears almost immediately and returns to life naked in a nearby body of water, […]. He has also stopped aging. [https://en.wikipedia.org/wiki/Forever_(2014_TV_series)]
Henry lives in New York and mostly climbes out of the East River, which adds an embarrasing twist to the story. There is an another immortal character in the show and they revive independend of each other. The same would be a nice explanation for the "mystical" about your little protagonists.