Poor Brodie. He might have hairballs. Pouncer threw up daily from hairballs until I started feeding him hairball control food... it really does work! No hairballs in months for him. He was Sir Pukalot, but no more.

But I do think its also possible to vomit from nerves. Poor little guy. I think the plug-ins you are lookign for are Feliway. Its worth a try!

By the way, is it worse since the move? Maybe he's still not completely used to his new environment yet?