It depends on the newts, and them actually starving to death isn't always the biggest problem.
I just got back from an 8 day vacation, leaving my critters under the care of my sister(thankfully she was willing to take care of them while I was away, and did an excellent job). I didn't want to have her do too much so she only fed a few of the fish, and some Cynops morphs. The Cynops orientalis adults and 8 karelinii went without food. Yesterday coming back the orientalis adults look fine...perhaps a little less plump but not by much. The karelinii in a densely planted 10 gallon also looked fine, if not a bit thin compared to how they normally look on 2x to 4x a week feedings. 4 karelinii in a larger tank with less plants, though, didn't do quite as well. Anyone keeping these knows how voracious they are and 3 of them were missing the ends of their tails. Based on this experience seperating them before you leave is probably a good idea.
(Message edited by fishkeeper on July 29, 2006)
(Message edited by fishkeeper on July 29, 2006)
(Message edited by fishkeeper on July 29, 2006)