Hey Diesel. My boy's brother is named Diesel as well. King had a problem with his tail when i got him as well. he would chew and whine all the time. His tail was always tucked in and he wouldnt let anyone touch it. I ended up taking him back to the place who did it and they found that the nerve ending had grown to the tip and were bothering him. Then re-docked it and everythign is fine now.