Our boy Kiska has very selective tastes for a Malamute.  
He particularly loves paper, but only one special kind:  
pink tissues.  After we first got him, I couldn't figure 
out one day what happened to all the tissues in the kitchen 
where Kiska was stationed.  The new box of tissues hadn't 
moved, but was completely empty.  It took until the next 
day during what we call "Poop Patrol", 
 that we saw the evidence; beautifully "wrapped"  you know 
what, still with a tinge of pink left in the wrapping after 
it had been through his digestive system!
He also seems to enjoy certain plastic products. I had a 
wallet that he enjoyed secretly chomping on--the amazing 
part was that the only evidence left on the floor was every 
single thing that had been inside the wallet--ebery credit 
card, dollar, coin, driver's license--not a thing other 
than the wallet did he enjoy, and there was not a trace of 
it left!