Grace, their mother was feral and she would bring her babies to my porch when she was ready for me to start feeding them. I usually saw them for the first time when they were about 4 to 6 weeks old. They were already terrified of people. It took us about 4 weeks to finally catch the little varmits! They were probably about 12 weeks when we finally got them in from the freezing cold.
All of my cats (except Sammy, Leroy, and Magoo) were from the same feral mother. She was trap smart and usually only showed up when she was pregnant and in need of food. I had to keep a good distance from her or she would run.
I haven't seen her since she brought us these last three and I'm pretty sure she is probably dead. It's so sad because she was a beautiful girl. She looked a lot like Maggie Sue.