Do a google search in the Kentucky area. Call those with solid credentials (and decidedly not AKC breeders) who are familiar with working Australian Shepherds. 4 months is way too young to commence herding training. Don't overtax her wee, immature brain & body. While waiting for her to mature physically & mentally teach her elementary manners, e.g. sit/stay and especially, work on a solid off line recall in challenging circumstances. FWIW, I wouldn't allow her to interact with chickens(their behavior incites chase prey drive and can lead to a life long desire to kill them) nor any other livestock at this age. Do take take her leased while you're doing chores and above all, keep her out of harms way. Good luck with her!