Catlover2,thank you for your reply and don't worry,Chico is a love-bug,gets all kinds of attention.
It's not bad between Chico and Vinnie,since Vinnie is not aggressive,they can sit beside each other,even sleep almost touching.
But if Vinnie feels playful and tries to chase Chico,then there will be hissing and Vinnie stops right away.
But like you say,it's a habit that started when Vinnie arrived 8 yrs ago.
I only have the 2 cats right now,my Tabby-Boy Rocky passed in september last year.