when we take our 6 month old pup out lately for walks she has run off the last two times ,it looks like she gets on a deer trail and takes off and not responding to commands to come back and when we take her out we usually have a check cord on her and let her run around but the last time she got hung up in a fence with cord and gashed her leg pretty good and now first thing in the morning i have to take her to the vet for stiches. i guess it's time to put an e-collar oh her and keep her with in sight ,but with that said will this hamper her natural drive to go out and find birds, she has a real good drive that i dont want to hurt it any help would be appreciated,thanks.