So, Tit’fille is gone. Not “dead” gone; “this isn’t her forever home after all” gone. Turns out that I’m not quite ready for a second cat.
The difference in eating patterns between her and Rosie was too much for my nerves. Rosie is on portion control, and she tends to nibble, then leave and come back later. Tit’fille gobbles everything down then goes looking for more. Keeping them separated, keeping Rosie’s food out of reach, then panicking because she hardly ate any of it when I managed to keep Tit’fille away: it was draining.
So, Cat Expert Sib took her back to the shelter. I hope she finds her forever home soon. Meanwhile, I learned something about myself; I can take in fosters for a few weeks and then let them go. If I did it once, I can do it again.