Gee whiz - isn't it difficult to see them shrivel up and become ghosts of their former selves ;_;
Simba was 16 lbs! now down to 9 lbs - happily, up from 7 lbs!
He used to have a hearty appetite, but that's no longer the case and he needs the appetite stimulant so he's not food fussy.
Thanks for your slippery elm bark suggestion