Thanks Nick. Personally, I would never breed this snake. I have a lot more experience with bearded dragon breeding. I can tell you for sure that there is a genetic issue with tail "kinking" with the witblit gene. I just had to put a 100% het witblit male down due to this deformity. I had purchased this dragon with the intent to breed some visible wits. I know many stories just like this one. I have seen it myself with certain pairings. Hundreds of eggs incubated in one single laboratory grade incubator (so precise and accurate temp and humidity throughout chamber) at the same time and only one clutch has babies with deformed tails. It is indeed genetic with dragons. Why would it be different with snakes? Seems like the majority of the issues I hear/read about with indigos is also "south" of the vent (aka tail area).
I understand the concern and conservative outlook on that.
It depends on the source/association. In the one instance with a particular gene for a morph of a particular species, it seems you have found a genetic root and I have zero reason to dispute that. However, it is independent of another scenario. See below.
I had often read back in my leopard gecko days that tail kinks were genetic. Same for some lacertids and some other species. So to find out for myself, I bred quite a few born kinked and born stub-tailed animals with each other from multiple sources. I got only offspring with normal tail characteristics. I even bred some of those offspring with their siblings or back to their parents. Still no kinks or stubs. I, too, mostly used laboratory-grade (Sanyo) incubators for these experiments.
I also did this with some irregular sand boas. Again, to find my own answers. Normal offspring. Obviously, there was no incubation here.
So I am not trying to say that this instance is not genetic, but I would be remiss if I concluded that it was, either. Test-breeding, as you and I have both seen, would yield the answers. If you hatch some indigo neonates with funky tails, then you would have your answer (and they could be sold or given away with full disclosure). If you hatched normal stuff, then you might have a different one and then the value in that would mean the individuals would not be removed from an already limited gene pool.
You have every right to look at this as conservatively as you feel about it, but there is some value (answers to questions and possibly helping the CB propagation of the species) to exploring the alternative at least a little.
However, to circle back, I believe if you want a full refund for this animal, then the seller should oblige you if you do not wish to use this animal as a breeder. In the event you did decide to explore the alternative I mentioned, then it would be reasonable for the seller to work with you (politely) on a partial refund due to imperfection relative to what you had been promised.
