Maybe tuna and sardines aren't working to lure Mocha into the trap because she doesn't have a taste for seafood. Hey, I never caught a cat so fast as the time I baited the trap with KFC Original Recipe! (Pro tip from our rescue vet.)
We aren't giving up on Mocha. We owe it to her - and to any kittens she may have. Although she is the last of the original 18, we won't be done trapping at the site even after we get her.
Many times we show up to trap, or to give Crispy his daily bread, and we see a new cat in the area. Often scared and almost always hungry, we are pretty sure these newcomers are abandoned pets. We are working on getting them now, too.
Even after Mocha, there will always be more. It is just about the only certainty in cat rescue.
Update: Mocha was caught in late April and taken to the ASPCA, where she was spayed and got a checkup. They noticed that she was lactating - her rescuers are looking for her kittens.