Right. What we call a 'Wobble' would be better termed "Inner Ear defect or neurological symptoms".
Spiders have this as a matter of course--if the defect is minor, the spider may not wobble--if it's more marked, then they will. From evidence, all spiders have it.
Other ball pythons may wobble, but generally for different reasons--a neurological or inner ear defect could occur in any animal. I also would not breed any non-spider that wobbled, in case it was carrying a genetic defect.
The wobble defect in spiders is PART of the spider mutation (from all evidence), so cannot be bred out. People have most certainly tried--spiders are one of the MOST out-crossed morphs out there, because there is no known super form.
It remains to be seen if the severity of the defect can be minimized by focusing breeding programs on the least affected animals only, or if it is truly random.
I have never had any normal sibs from spider clutchs show any trace of a wobble. I suspect that when this happens, it is unrelated to their being spider sibs.
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