I just wanted to comment that you're giving out great information! I'm selling a newt but I've been referring people asking about it to your thread because people should know how to take care of one and I'd rather they learn beforehand.
It's most likely a high parasite load. Wild caught animals are really dragged down by these. I've never had to dose one of mine with meds, so I don't have any good advice for that. I would try searching here for anyone else who had similar issues : http://www.caudata.org/forum/ But keep in mind that if he's weak, the meds could kill him Some people prefer to wait and see if the load goes down while in captivity.
Roger that. My research also confirms this hypothesis. I am not going to medicate at this time. Wondering if I should quarantine him in case of an outbreak. I read of several folks doing this but not with easterns. what would you do?
I might separate him so I could monitor how much he's eating, but at this point I don't think the other newts are going to be affected. I'm sure they have parasites, too, but they are probably healthy enough to not be bothered by them.