Sounds like her little system is over taxed. She needs time to recover. ACV does a bunch of good things, like reducing harmful levels of bacteria, and preventing algae, detoxification in some cases, and stripping the mucus from their systems, which also further improves nutrition and vitamin uptake, and boosts their immune system, and best of all? It can't hurt your birds, in any way. Ever. Its natural. next time for prevention of worms try feeding pumpkin seeds. For control of mites ,lice, and other pesky critters, try putting neem oil on roosts. Treat the area and fix the problems and let the birds recover as naturally as possible. Some drugs are so harmful to chickens. They swell kidneys, liver, and do some nasty business. Antibiotics treat a symptom, not the cause. Antibiotics/worming medication make it worse sometimes. If you give a sick bird the wrong thing it can go very wrong. For example..worms When worming your chickens, you kill the weak worms and leave the strong behind. They breed and make stronger worms. You reworm and you see fewer worms because the strong have gotten stronger. All chickens havee worms and so do we, use natural things to keep them at a tolerable level. The same goes with giving antibiotics. You create stronger issues. Harder to kill bacterias(if you even have any that were a problem you might awaken them).