A few months ago some friends took in a feral cat they found hanging around their garden. Of course, she turned out to be pregnant and some weeks later presented them with a litter of kittens.The mom is now well fed and a lot healthier than she was when they got her but she still appears to have a permanently angry look. Maybe it is the demands of motherhood. There is a picture of some of the kitties here: http://365project.org/gardencat/this-and-that/2013-10-19