The flags are here to help remind Judd he can not go past them. His collar also beeps to tell him to not go past the flags or he will receive a shock. The other day we were walking with our heads down sniffing the ground and he wasn't paying attention, he was really focused sniffing. When all of a sudden he got zapped and he started yelping, he ran past the flags and then turned around and came back through getting zapped again. I did know what was going on but I started hauling ass to the house and Judd was right behind me. Mom laughed at us and told Judd he needed to be aware of his surroundings.