Feral mommas have so much on their minds-- I'm sure she didn't leave them unless circumstances forced her too. SHe clearly trusted your place to have her kittens. Wise kitty.Oh this isn't the first time I've had to hand raise kittens or little helpless critters in general.. so I'm well aware of the whole issue with taking care of their bodily functions.. (and a wet warm cotton ball works very well for imitating momma cat)!
We used washclothes instead of cotton balls.