Hey bowmore bill.......Nice to see this piece of writing again. The analogy in this is quite clever.
It is interesting you put this in the poetry section as I thought this was a sort of prose microfiction (nonfiction). By putting it here in Review My Poetry, I see where you wish to take Nightmare.
I think I'll start off what I like.....to each is own of course....but there are some lines after several reads that have become my favorites.
----Across the land the slaughter of the innocents begins in earnest. -----part of me wishes that your poem begins with this, because its shocking and hard to turn away from, and is what I call pulling the reader in......
------Cattle their eyes wide with terror bellow their fear, as some inner sense warns of the impending holocaust. -----I like this line because I used to work as a nanny on a farm when my son was small. The family had a pig they were fattening up for a pig roast..................and the kids and I would feed it scraps of fruit and vegetables. He would run towards us happy because he was getting treated. Yet the day of his death....he knew, and was frightened. Somehow he could sense that his time was near and was not going to pleasant. So there is much truth to this line.
-----Like the cloven hoofed, their bodies were piled high like so much rubbish waiting to be incinerated.--------the analogy is very clever, and it implies waste. Waste of life.
I like some of the natural imagery in here: dark sullen skies, fires burn brightly, black smoke spiralling heavenward, cloven-hoof.
Whenever I read cloven hoof I think of the bible and you mention heavenward........I can't help but think of the idea of judgement day...........another sort of analogy in your poem whether you intended for it or not.---might have an effect on readers with a guilty conscience---lol! I like it...not sure how the Atheist feel about that but for me....it works.
herded like cattle onto trains--very clever
Okay, so here are some lines that I consider telling---------when I read a poem I like to figure things out on my own-----I love little clues however, but telling almost makes it too easy and robs the reader of forming their own picture in the mind's eye.
--------showing scenes straight out of hell, -----to some readers, this isn't that hellish.......they want much more shocking imagery...so this might be a let down for some readers
---------as some inner sense warns of the impending holocaust.-----------as soon as I read holocaust, I automatically think of Hitler and concentration camps, so this telling is giving away information too soon. You want to save this shock factor for the very end------make the reader say HOLY SH*T I never thought of this that way! Yet this is the third line of your poem!
---------From near and far the butchers gather, --------here I want to see these butchers. My idea of a butcher is the guy dressed in white at the grocery store with beef juice stains all over his bib! who were these butchers? what do they look like?...............I would like to know......show me........using words----paint an image in my mind
----------------The smoke filled skies and burning fires serve to remind mankind of another holocaust.-------very much telling and repetitive
The line I am pondering----------A common bond links man and beast as their ashes mingle high above in the stratosphere, high above the killing fields.
I would like to mention that there are those who are not aware of the slaughter of cattle in England and the reason for it........you may need to put in a clue. Some may argue that the cattle killed was for public and farm animal health...............however, the way it happened was certainly of a hellish and holocaustic nature.
IF I have any more thoughts I'll let you know. And please feel free to disagree with me--------I'll not be offended.
oh, and another thing.......I just thought of .........you might for starters put shape to your poem.......sometimes that opens up a creative thought for the poet.