Freedom has used Feliway successfully on Vita...she does not recommend the plug-ins. She has a little cloth 'sleeve' over a collar Vita wears, and put a little shot of the Feliway in that.

My vet said cats should ideally have exposure for four hours...yeah, right, my cat stays ANYWHERE that long! The vet also wanted to try a med - but I asked to try the Feliway first.

So I came up with the Feliway Collar idea, and my vet loved it! It has worked very well also.

If you have any leftover Feliway, might want to give it a shot.