Quote Originally Posted by WingedWolfPsion View Post
See, I personally need a lot more evidence before I would risk my snakes with something like this--I want real long-term trials, not just a few months or a year on it, too. It's safe for people to eat pork raised that way, but people do not eat pork exclusively--they eat many other things as well, so that doesn't necessarily mean the levels of copper in the pork aren't excessively high for humans. If you eat a lot of pork liver, you may find copper toxicity is an actual risk. Our snakes will be eating the innards along with the rest of the animal, including the organs that concentrate copper.

While most non-ruminant animals appear to tolerate copper very well, there are some species that don't--including some breeds of dogs, and as was mentioned, some fish. Since copper toxicity harms the liver and kidneys, it's definitely something that would need to be studied for a long time, with each species individually, and very thoroughly, to be safe.
LOL, I think 95% of snakes in captivity today are proof that you are worried about nothing.

Why do I say this? It is easy. The hog feed I am using has Copper 16 - 19 ppm.

Mazuri 6F, what the great majority of Rodent breeders feed has Copper 22 ppm. https://www.mazuri.com/PDF/5M30.pdf

So yeah, if your worries are true, you better switch to the hog feed right away!