Hello All! I have a 1.5 week old silkie, Grace. She has wry neck. I began giving her Rooster Booster, Poultry Cell, per the vets instruction, last week. She is doing much better, but when I tried to put her back with the flock, she started acting weird again about 12 hours later. She is isolated again. Her poop is very dark in color and thinner than normal. Is this from the Rooster Booster or something else? The picture is poop from a few hours ago. Thanks in advance!