I adopted two kitties from 2 different animal shelters last year in Dec. One is bright happy and overly confident. The other is afraid of everything and anything. He has zero aggression, just protectively curls up in a ball. He acts terrified of us every day (even though he can get cuddly in the evenings) the next day he is back to his terrified self. When we have company at the house, he will squish himself under a bookshelf and not come out to eat, drink or poop - even for days. We feel so bad for him. A loud sound, the housekeeper, the vacuum - everything/anything sends him scurrying. He is so sweet and adorable, we baby him, bring him into our bedroom for solo time (he opens up more when the other kitty isn't around), but he never seems to make real progress. My husband thinks he is "Special needs", but we don't know what he's been through before we adopted him. I've tried the calming collar, the pheromone diffusions, even a thunder vest. Nothing seems to help our little guy. I've owned cats all my life, and I have never experienced a cat like this. Would love any advice, or stories of similar cats making progress with this type of personality.