My black sex link is a runt. She was in the brooder with 2 others the same age and they are double her size. Yesterday something happened and she can't walk right. She takes a couple steps then falls over gradually. She uses her wing to catch herself. I removed her from the community brooder. She seems to have a healthy appetite and is drinking. I've read about infant vitamins. How many drops should I give her daily? I'd like to try that route before putting her down. Thanks!