If your kitty does have CH, you'll have one of the most lovable cats ever! I have two of them, one admittedly is a very mild case but the other is severe and nothing stops this girl. I hope your vet can get to the bottom of it all; it may not be CH but it does sound like it. And, if it is, there is no need for euthanasia. There is treatment for it and they learn how to cope very quickly and you will, too. Please keep us posted on this. Prayers going up for you and the kitty that all will be well.