I hope Darcy gets to feeling better very soon.
Sending hugs,
adding: When my dad had chemo, he said things tasted metallic, so nothing really tasted good to him. He was able to eat fresh fruit, which may not be an option for Darcy. I guess my point would be that her "buds" may be off as well as her stomach and you will have to keep trying until you fid the thing that overcomes the bad taste.