A day and a half ago I noticed one of my hens was very lethargic, and quickly figured out that it was sour crop. Since, I have given her apple cider vinegar, tried to feed her yogurt, and given her a small dose of yeast infection cream (clotrimazole). I've also massaged her crop, and when all this failed to change anything, briefly tipped her upside down to empty some of the fluid. Her crop now seems a lot better, but she has no appetite. She was already a very skinny chicken (malnourished rescue) and I'm afraid that if she goes much longer without food she'll perish. I haven't had a syringe on hand for feeding, but I just got one. Also don't have access to nutri-drench or other supplements. Should I force-feed her yogurt? Any other at-home supplements that will help? She barely has the energy to stand.