[quote]
Dredges were a bit like feral hounds save for the rotting skin and exposed bone. They were also considerably big, measuring up to the largest of dogs. Also unlike dogs, they aren't at all natural but instead are the product of magic. They are the result of a rather lower tier incantation of summoning but incredibly useful if the magic wielder needed to hunt down anything living, as long as they didn't need anything alive of course. What did this anonymous summoner want with a Draconian Paladin? No idea. Probably for sport.[/quote]

I described them a bit. They are summoned and are more undead than demons. Imagine like undead wolves with a huge appetite for anything living. They really only follow direction of whatever summoned them but they also follow the same hierarchy of a wolf pack so there will be an alpha in the pack. 

The issue with what you posted is the assumptions directed towards Arco. He is a Paladin and more than capable of slaying demon and undead alike. And he was not punching the dredge. He smashed its neck with his mace (which is blessed).