Just jumping on the bandwagon. If you breed spider x spider, then you only have a chance of getting spiders out of the clutch (as opposed to spider-pastel (bees), spider-cinny's, spinner's, etc). Also, as already mentioned, further inbreeding of the spider gene, besides being potentially "fatal", may increase the likelihood of the wobbles. That's why most breeders breed spiders to other co-doms, recessives, etc. BTW, the Axanthic spider IS killer!