Have a 8 m Speckled Sussex pullet injured and in need of PennG. WOuld like to give 1/2 cc IM everyother day. Which muscle do I give it in?? THe breast muscle is a little thin and one leg is also injured. Use the good thigh? and alternate with the one with injury at hip? I feel so helpless with so little experience with chickens, so many thanks for your answers.