However the good news is Jeffrey is on a one-week home trial with a very nice couple and their 2 year old tabby Halley. They said he was a sweet - kitty, if only he didn't yell at their front door at 2am until dawn. It seemed he had a lot of stamina and would meow non-stop. Oh dear! But now that they're armed with his stuff lion, Feliway, a bottle of Stress Buster and a new type of litter (he has the sniffles and I suspect it's the clay litter that they were using), I hope he would meow less. But there is no guarantee.
On the upside, their kitty Halley seemed to like Jeffrey and this may tip the balance in his favor. But I still don't know. They may decide that Jeff is not for their family still.