Our 2 year old male cat has started hiding in any small corner of the house, hes an insider, wanders out rarely, hes always been very "vocal" - talking to us, but hes quiet now, been off his food (unusual for him) but has had a small portion just, and done a whoopsy, then off to hide in a wardrobe, whereas he would usually flop down on our bed or the sofa, hes purring when stroked and his nose is wet, any ideas? wife did use a carpet shampooer/cleaner yesterday but think he started this before then. hes not been sick, and his stools have been normal. thanks in advance