I might add something to the mix. Is it possible that this is simply a rascally kitten getting 'taught' manners? I think if it went smoothy at first, and now is becoming a problem, it might be that the older cat is getting fed up with this bratty behaviour???

As to the nuetering, remember that it can take some time AFTER the sir jury for the body to rid itself of the hormones.

As to the purrno, that is quite a funny word! I can think of one thing Tex does that would classify as purrno!!!!