Just yesterday I picked up a pregnant cat from the SPCA to foster. I am trying to figure out how far along she is and was wondering if anyone here has some good ways to tell. She is not huge, but she is a tiny cat, I think maybe not even a year old, so will likely have a small litter. She is "nesting" in the sense that she's hiding out in dark places, but I don't know if this is because she is ready to give birth or because she is scared of her new environment! She has two nipples that seem quite large, and one seems a bit crusty, maybe dried milk? Anyways, I've been trying to search on google and read a bunch but still can't really find anything clear answers. Does anyone know how to tell how far along she may be? Thanks!