alsih2o said:
			
		
	
	
		
		
			 has anyone put an expiration date on their undead? or is a zombie,once produced, able to stand around for millenia without decomposing? 
		
		
	 
Back when I DMed (I'm a Player these days), I had zombies last forever. 
Little chunks of zombie meat (fingers, toes, teeth, etc.) would always fall off my zombies, and those pieces would rot on the floor.  However, my zombies would never diminish in size (more than a little), nor rot too much themselves.  
This was because my zombies magically summoned back--as 'fresh' meat--the pieces that dropped-off.  They accomplished this slowly, molecule by molecule, as the pieces rotted away on the floor.  This reconstitution-by-summoning was a necessary part of my zombies' nature, otherwise a single meat-dropping zombie would eventually fill-up an entire dungeon with discarded zombie bits!   
I always enjoyed describing zombies to my players, by the way.  
Like my zombies, my skeletons lasted forever, too. 
So, to answer your question...Yes, in my old campaign, skeletons and zombies could have stood still like statues forever, holding any pose their master wished.
Oh.  And when a really old skeleton or zombie got destroyed, it would suddenly 'decompose' to its proper age.  For example, an old skeleton would turn to dust, while a fresh one would just fall apart, wetly.
 
TonyM