Yes if any of them have ears tipped that would be a sure sign. All TNR cats should have ears tipped.
I hate to even ask this... but is it possible for her to have been pregnant with kittens that died in the womb and stayed inside her? I assume that's not possible, that she would be seriously ill if that happened. In November, we thought she was pregnant, but no kittens appeared, and she still looks big, so we've just been assuming that she is just fat from multiple people feeding her, or just fluffed up for the winter.Do you think someone has already spayed them? It's almost impossible for an unspayed cat to not get pregent in over a year, let alone several females. Cats usually have 2-3 litters a year. Which is why, yes, it's always worth it to spay them!
It sounds like, after the spay, they will give the cat back to me in the same trap with some food inside, and I will keep her in there until the following morning. There was no discussion of moving her into a larger enclosure, and I'm not sure I could handle doing so anyway. I guess that's not too comfortable for the cat, but it's only for the night. They said they express her bladder beforehand to minimize messes in the trap.Ideally, you would have a recovery cage (a medium-to-large dog crate). Cardboard should be put down (you can "pre-season" a few flat pieces by putting them down in the cats' home area, to get the scents of home) on the floor of the crate. A cardboard box as a cave, and a litter box of some sort with leaves and dirt also from the cats territory placed behind it and kitties will be more comfortable and less scared. I still cover it all with a blanket or towels. Food & water dishes can be attached to the door but typically, the cats are released prior to that.
Generally the sound of the trap closing will make the other cats run. So immediately go collect the trapped cat and then give them time to calm down. Of course, take it on a case-by-case basis---if for some reason one doesn't run and is sniffing around the other trap, don't interrupt them.I have two traps. When one cat gets caught, what should I do? Wait and hope that the second cat gets caught, too? Cover the trap with the cat, but don't move it yet?
They're usually too scared to attack so that shouldn't be a problem. Of course, take each cat as an individual, and be careful. Leather gloves would be a good investment.Alley Cat Allies says to secure the doors of the traps with carabiners or twist ties, but it sounds a little dangerous to stick my hands in the trap to do that.
When kittens die in utero, if it's not too far along in the pregnancy the fetuses will just be reabsorbed by the body. If it's far along in the pregnancy, they will be expelled by the body. In the very, very rare case that a kitten dies and is not expelled, it's possible for a kitten to be "mummified" and stay inside the mother cat for an extended period... but this really is a very rare and unusual occurrence, so I wouldn't worry about it. It is more likely that this cat just has a round belly for other reasons.I hate to even ask this... but is it possible for her to have been pregnant with kittens that died in the womb and stayed inside her?