the double edged sword of safety collars. I got one for my kitty, with a bell, because she hunts birds. She seemed ok wearing it, she is a laid back gal. The next day the collar was gone without a trace.
Write his name and your contact info on the colar with sharpie. Not pretty, but non-jingly as well.
As far as harness goes, it is tough to say what works. Wally World has now a selection I saw while shopping for catfood. Not sure how they would work, as my cats are vastly different in size.
In your case I would ask if for the short stay a dog colalr would work. it is risky but more likely to stay put.
