I’d have cut his junk off, cooked it in front of him, them made him eat it for his last meal. All while he smells his flesh get seared to cauterize the bleeding.
After that he could opt for a free helicopter ride until it was time for him to disembark at 2000 feet or be fast roasted alive in a crematorium.
I believe in giving people like him at least two choices. I know; just an ‘ole softy.
Your punishment sounds good and thorough for such an unspeakable crime on an innocent animal. I’d put some of my nice sharp garden implements to use; how about a four-pronged tiller up his butt until it pierces his intestines and he feels the pain the dog must have felt. Then just let him drop and bleed out, like he did to the dog. Throw the remains to pigs. Make the idiot judge watch.