[Gil-Galad]

well if they took them off in later years, you would think the bodies would be already decomposed... another theory i came up with was that maybe the dwarves didn't fight at Dagorlad, but after, and participated during the siege of Barad Dur, so maybe only the elves and men fought in the marshes, but when they broke through into Mordor, then the Dwarves came in to help, that would explain there being no dwarven bodies in the Dead marshes