🚀 go-pugleaf

We were feeding a pregnant feral cat on our deck last year. When she
had kittens she would bring them with her to get food. After gaining
her trust, we got her to come inside. The kittens followed. When we
closed the glass door, the cats all went temporarily insane. We
eventually got them all herded into our basement, so at least they
weren't outside anymore.

Once they were confined, we got them all to the vet one at a time. We
would pick up and hold each one, first with a towel, then by hand,
every day to get them used to people. After a month, we were able to
bring the kittens upstairs one at a time, first into cages, then
running free. The mama cat used to hide in the joists under the upper
floor, so we eventually had to get a raccoon trap from the shelter to
trap her in our basement. We brought her upstairs in a large cage
until she was 'civilized'. 

Now, mama cat is a lap cat, and three of the four kittens are
completely domesticated. The last kitten wants nothing to do with
humans, and we see her occasionally, but when she's with the other
cats she's fine (she was the last to come upstairs, and was the
hardest to find during the handling phase, so our guess is that she
never imprinted humans as family.)

If you have other animals, the cage phase is a must so that they can
have their superiority battles while separated by metal bars.