There is a cat that has been hanging around outside my house recently (I think it belonged to a neighbor who moved out suddenly a few weeks ago). She is very sociable and human-friendly so two days ago I decided to take her in and see if I could help. I asked around to see if she belonged to a neighbor but nobody recognized her then I took her to the local Pet Smart to see if she was chipped (sadly no). The nurse that scanned her told me that she is pregnant because she has pink nipples and is not lactating. This morning I took her to my local vet to make she sure she is health, get her tested for any communicable diseases and to see how far she was into her pregnancy. The vet told me that she has already had her kittens because he couldn't feel them when he grabbed her stomach. As soon as I got home I tried to get her to go to her kittens but she seems to have no interest in looking for them. First: she seemed to be fine with a leash so I tried using the cat harness we have for my other cat, she lead me around but didn't really seem to go anywhere. Next I took her outside and tried following her from afar but she just went around sniffing bushes before coming back to me. I then tried putting her outside and going back inside but she just came back up to my door. Finally I tried putting her outside and getting into my car, she wandered around outside my house but didn't seem to be calling or looking for anything so I took her back in after 15-20 minutes. I have called around and various vets and have been told that stomach palpitations are not a very accurate method of detecting a pregnancy in cats but that they couldn't be certain that she was still pregnant without seeing her (and wouldn't be able to see her today.) The only place that is able to see her and is equipped with ultrasound/x-ray is an emergency room but they quoted me $300 minimum... I am very worried because if she has already had her kittens then they have gone almost 48 hours without their mother and will have gone even longer if I wait until tomorrow. I have tried looking for them but I haven't heard anything that sounds like kitten calls... Is there another method I can try to see if she is still pregnant or not? Any advice in general would be helpful.