Every now and then I end up with a feral mom cat with kittens. This mom cat decided to give birth to her kittens in the trap while waiting for surgery at the SPCA of Tompkins County:
I put two dog crates back to back, after folding the back panel of each one down inside. I fasten them together with wire ties. I put folded towels on the bottom (with one under the nest tub, and one on each end), a rubbermaid bin or small laundry basket in the middle, with towels draped within and over the sides so the growing kittens can climb in and out while mom glowers.
I put food on one end in bowls attached to the wire (I like Quick Lock crocks) and a cat box on the other. Both ends have doors, so the food and cat box can be addressed without reaching over mom. There is plenty of room for mom and kittens to move around.
I cover the whole thing with a sheet. I then put the kittens in the tub, and release mom into the cage.
It's important to check the kittens to make sure they aren't ill, one hasn't died, or mom hasn't killed one. In this case, mom did in fact attempt to kill one of the kittens who seemed rather premature (he had to be put down). The other kittens did great while I was traveling, but when one didn't open her eyes at the appropriate time, I snitched them out, and sure enough they had an upper respiratory and her eyes were crusted shut with pus (yick) beneath. Usually a mom cat licks their faces rather vigorously and the crust is washed off and the eyes get cleaned out, but apparently this mom did a good job with kitten butts, but not so great a job with their eyes. So I bottle fed them for two weeks and sent them of to a great foster home to be cuddled and fed by a family with kids and teens, with lots of love and noise.
They came back a few days ago, full of piss and vinegar, and with the beginning of a new upper respiratory, which went away almost immediately with Clavamox.
They are almost perfectly litter trained. Yes!
I'll get some pictures of them when they finally sit still.