Well, there weren't many Dumerils to start off with. I'd have to look at my papers to get accurate info, but here's some rough info. They were bred in zoos, then offered to some in the public sector. For a while things such as small eye syndrome started to appear, seemingly from inbreeding. Dumerils were at one time one of only two snakes on the SSP(species survival plan) and they are CITES app. 1 animals which makes importing/exporting them difficult at best. They can be though if the proper paperwork is in order, and you meet certain criteria. Now, as the story goes, Dr. Gordon Schuette imported Dumerils from Sweden(aka Swedish bloodline). After he did his work with them, Kevin Hanley acquired them, produced more and sold them. I purchased several animals from Kevin, and I've produced several litters with these animals making for good outcrossed stock. There have also been animals smuggled into the country from what I have been told. Also The Bean Farm used to, and may still, offer males from animals out of the SSP program, which if being bred by AZA standards should be great stock. It's 1 a.m. I'm sorry this is so cut up and half a$$ed info but my point is....Do what you can to buy unrelated stock and you should not encounter any problems. Don't buy a pair from the same litter for breeding, try to find out as much as you can about the lineage(who the animals came from, what animal they were bred to, and where did it come from, etc.) I have Dumerils from the Harding, Sorenson, Lemke, and Swedish lines just to name a few. Wow, I'm tired-lol, e-mail me if you need more detailed stuff and I'll see what I can dig out for ya. Take care
Paul