I have a 5 month peahen that started with cocci. Treated with Corid for 5 days and she was not getting any better. This was over a week and half ago. Stool showed no sign of yellow foam or any issues. I started treating for blackhead with metronidazole 250 mg. cut in quarters given 2 times daily. She is segregated in a dog crate with food and water. I re-wormed her with Safeguard 1cc and found trace amounts of cocci still in system ..re-treated with corid. I started the metro tablets on Monday...I am not seeing much improvement and her eating is limited. She prefers bread and tomatoes with little eating of her feed. How long should I let her continue this way - treatment is for 10 days with the tablets.