As I mentioned earlier, I baked some plain chicken for treats for the girls. Scarlett isn’t fond of the store-bought treats, she doesn’t care for fish, and she barely sniffs at red meat. But chicken? All bets are off. I made a little trail of chicken bits leading from the hallway to the bathroom door, and she gobbled it all up. She even lingered for a while near the door, apparently hoping for more chicken. Since her tail was straight up (!), I indulged her. She even purred for a while! The experiment will be repeated later when my boyfriend arrives and we can feed each kitty simultaneously. I don’t know what Melly’s taste in treats is yet, but what cat doesn’t like chicken?
The above is not actually the victorious part. The victorious part is that I found what is definitely fresh poo in the litter box! Yay, Melly!
(In case you can't tell, I'm getting more optimistic about all of this. I'm a worrier by nature, and tend to freak out a bit when things start to go pear-shaped. But all of your advice and stories have really helped, and I can tell that things are improving, however minutely.)