Some of you may remember that I have been looking after my elderly neighbours budgie for a few weeks while she was in hospital,feeding him twice a day in her house.I have 2 cats so could not bring him to mine.Well, neighbour has been out of hospital for 10 days but is not great,I have been popping in daily for a chat to check on her and budgie as well as I am worried about them both.My neighbour is a heavy smoker, and last two days budgie has not eaten, and has been sitting at bottom of his cage.I have brought him to my house[locked catsout]but am really worried for him.He has been eating his millet stick and drinkinwater okay, but not touching his usual food.He has been sitting there with his feathers fluffed up, and I thought at one point he as shivering.I have never been a budgie owner, is this behaviour something to be worried about, do you think I need to take him to the vet?