the spider wobble

[Watever]

A good search will yeild years of debate. But to quickly answer your questions.

Yes

if its a severe enough case that can feed or drink.. Yes.

How can you say it's hereditary ???

I don't think we know so far. Looks like it's related to the Spider gene. Don't think it's a gene in itself, otherwise we could have pull it out of the spider and could have got it in other morph. Which so far didn't happen.

But we can say it's hereditary, in the case that it can be pass from any offspring that have the spider gene. Or that the Wobble is part of the spider gene.