A little one-sided?
Go to the following link: http://www.livingunderworld.org/amphibianArticles/article0007.shtml

This site was a colaberation of multiple herpoculterists with much knowledge and experince in the field of herptiles. More so than you or I. Just because you have been doing somthing for 15+ years does not mean you are doing it correctly.(I do not mean to sound rude at all by this.)

What I cannot understand with people that mix species, is why take the chance of killing a group of God`s creature in one fail swoop instead of just housing them seperatly.

Oh, one more thing, you where concerned about the toxins of the fire-bellied newts. You also need to read this article on the same website. http://www.livingunderworld.org/amphibianArticles/article0011.shtml.
The article goes into great detail about the toxins of your oreagan newts. I wanted to know if you knew this is a fictional name made up by the pet-trade. I just thought you would have known that in your ample experince with amphibians and reptiles.