I have a stray who came to me last week who appears to be pregnant. I took her to my vet who tested her for feline leukemia and FIV and she came back negative. He felt around on her belly and said he was 90% sure she is pregnant, but he couldn't tell for sure. He gave her a rabies vaccine, dewormed her, treated her for ear mites and sent her home with me. We will complete her vaccines after the supposed kittens are born and it is safe to do so. She also appears to have a minor respiratory thing going on, but the vet thinks it will go away on its own - it has not gotten worse, but she still occasionally sneezes. She has put on weight the past few days with all the good quality food and her belly is definitely rounder as it should be if she is pregnant, but now her nipples don't seem as prominent as they did before. I am worried that maybe she isn't pregnant and it is FIP. Shouldn't my vet have thought about this and shouldn't he have actually been able to tell if she is really pregnant? I don't want to go in for another expensive visit if I don't absolutely have to because they charge me $45 every time I walk in the door, but I am now questioning if she is indeed pregnant. Any advice on how to tell for sure? Her nipples are still exposed and more prominant than my other female cat's nipples, but they haven't turned pink like I keep reading they will if she is pregnant. She is currently living in an outdoor insulated garden shed but I would like to bring her in eventually when I can convince my husband that a 3rd indoor cat wouldn't be such a bad thing and when I can be sure my dogs won't try to harm her. Our house has a fairly open floor plan and there is no room to isolate her in that doesn't get heavy traffic and use. If she has FIP would that be a risk to my other cats? I don't know what to do.