Posted: Sat Apr 01, 2006 2:39 pm
It could be an abcess. Abcesses are often located on the neck where the ears would be, however, they can occur on any part of the body. The best thing to do is take him to a herp vet to determine what it is, If it is an abcess, the vet will lance it to take out the pus and most likely prescribe antibiotics to rid the system of any infection. I'd get it checked soon, especially since from what you wrote it seems to be affecting his swimming ability. (If it is an abcess, it won't go away by itself.)
Good luck. Let us know what happens.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-