I have a feeling you're going to be feeding two kitties. Given the access into and out of your garage, there's really not any way to control what kitties eat food that's put out. That's how we ended up with a colony of 20 at one point!
We got them all spayed and neutered, all the kittens were adopted out, and two of the older ferals we found homes for - and the rest disappeared at various points in time.
(We live in a very rural area, so we ended up both feeding and trapping a lot of coons and possums along the way!)
Good luck tomorrow!
Laurie
Good luck tomorrow!
Laurie