Demasco, I'm glad to see I'm not the only one writing about cows and calves!
I like that your lyrics, so far, are simple and tell a story without telling whether the action is right or wrong--but you show the son's hesitation and sympathy for the calf, since the son took the calf out for one final graze at sunset.
It sounds as if the farmer's son is going to go through with killing the calf since he says, "I must look away." The song so far has a nice ominous feeling to it that I like...it makes this moment of death and the wondering about it, about the rightness of it, stretch out.
I especially like the line, "It won't help to pray," because it suggests these life-death decisions people make about the lives of animals under their power are not actually made by any god...it is the people who make and rationalize them.
I assume your Farmers Son album is about a farmer's son in the 1960s or so, because these days people would call a vet for a sick calf on a family farm (and there are very few family farms), and killing calves through blunt trauma is illegal, best I know. However, it is still legal in the U.S. and recommended by the U.S. pork industry for producers to kill sickly or small piglets by blunt trauma.
To have the life of another sentient being in one's hands, all in one's hands, is an awful thing, an awful power, I feel. I'm glad you are writing about it.