Oh, yes. Like I say, I've been there.
In my case, it was a very beloved hen named Meegan. She most likely had a reproductive cancer or egg-yolk peritonitis. This was pretty early in my chicken days and I was late catching it. She was thin and had little appetite. I was bringing her 8 course meals of anything I thought she'd eat. And she would eat it, but it was more out of novelty. An hour later, she wouldn't want anything. Then I'd try something new, she'd take a few bites, repeat.
I think this was just delaying the inevitable, and it would have been kinder to just offer some egg, her regular feed, and water. That way I would have known if her appetite was returning rather than her trying something because it was new and interesting.
I hope your little lady keeps chugging along!
