I just bought Pen G to give our hen with bumblefoot. On line I read to inject 1/2 cc intramuscularly in breast or thigh. Gail Damerow's Chicken Health Handbook says to inject 1/2 cc directly into the swollen pad (if I read it correctly). Her pads are not very swollen. If I inject the feet, is it 1/2 cc each side or 1/4 cc each side totalling 1/2? Anyone with experience please help ASAP, we want to get her started on this tonight! Thank you!!