I have a stray in the neighborhhood (it's a TSR neighborhood, so I'm watching this cat closely). I've gotten to the point where she will now allow me to pat/stroke her on the head and neck (starting from hissing if I got within three feet of her and taking swipes at me with her very sharp claws). She is very pregnant, classic symmetrical saddlebags look when walking away. She has the typical emaciation of end-stage pregnancy (the spine sticks out). But I'm thinking she should have birthed by now. Is there any medical condition that LOOKS just like pregnancy?