Two of mine have long tongues. Mookie, being a bit younger, manages to keep most of his in his mouth. It is r e a l l y long, though. Mocha's is always out and gets dirty too. When he was on phenobarbital, all his muscles relaxed and his tongue stuck out even more.
Ferdie's tongue started to stick out about the same time we noticed a hump begin on his spine - which was about 8 months before he was diagnosed with Protein Losing Entropothy - never knew if it was related or not. Bella or Rupert do not have tongues that stick out