What can we do to make grouchy cat happy?

Actually, cats aren't really grouchy unless annoyed when they're eating or resting. Some cats look grouchy because of the shape of the mouth, pushed-in noses or the way their colors blend giving them an angry look. Of course if your cat scratches or bites, s/he may be telling you her mood is not so good or you've disturbed him/her. Your cat will come to you when ready for socializing.