If I were you, I'd take a BEE-BEE gun w/me to the field and when the dogs come into range, pop them in the butt. That will get their mind off deer really quick. Most BEE-BEE guns won't break skin on dogs, but even if it does, it'll give them a reminder not to come back. Had the same problem w/dogs knocking over my trash cans and scattering trash all over my yard. after 2 trash days of popping them in the butt, they no longer do this.
JESUS is LORD!