I've been following fowl dawgs and recently tried to start swim by but ran into a problem. My dog will go across the pond on the line sent but then once across the pond he will run all the way around back to me. Only way I've been able to correct this is with a check cord to influence him back into the water to swim back to me. I have for now gone back to double T until I have a better plan for swim by. The pond is somewhat small but it is the only pond I've been able to find close enough to be of use, maybe 30'x 50 when it is full.