I agree freezing the eggs of breeding siblings does sound extreme, however consider the longer term inplications of raising inbreds. The inbred babies can be expected to be weaker, smaller, genetically impaired, and in some causes curly and broken tails can be expected.
The weaker inbreds are then sold to new owners, who decide to breed there own dragons and it goes from there as they sell their babies.... the weakened genetics are now thoroughly incorporated into an already too weak gene pool in this country.
Irresponsible breeding is not only a bearded dragon problem, it happens with every pet species. Owners who want to breed either; a, because they can, or b, just to make a quick buck, should not be encouraged. Many dog lines in this country (german shepherds for example) are now so weak from inbreeding and line breeding to acheive certain show traits, that the majority of the population in this country now has some form of health defect. Breeding any animal should be left to those who take the time to research several generation back, who have the papers to prove the genetics, and who have the market to find new homes for the offspring.
Before anybody takes offence, this is just my opinion, and no I do not breed, I just keep animals for the love of them.
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Ross
0.2 Bearded Dragons (1 Yellow, 1 Chris Allen/Sandfire)