Thank you ALL very much for your support and suggestions. I like the idea of the diffuser, and if Part 2 here doesn't work out, I'll go for it!

I went shopping today. Bought a REAL cat collar, quick release and all. It had been returned because it didn't fit, and was a basic black. I got it at a reduced price.

Basic black. Cool. I put it on Oscar, and no big problem. He seemed to KNOW something was different, but wasn't sure what. Basically he was totally fine.

Now...I didn't want to loop a small wad of towel on there. SO I took a very small square of towel, cut a small hole in it, quadrupled a piece of darning yarn(can't find my bias binding), put the yarn thru the hole, Put a shot of Feliway on the towel, and tied it around Oscar's collar. He freaked a bit...but I got it done.

He is really fine...the Feliway kicked in!

I hope this works, because stress can bring back his idiopathic cystitis.

So far, so good.

Thanks again all!