Hi Frank if you have another dog that is trained to the lead bring it too it will take time
do it twice a day start with 100 yards up and back then go longer all the time after a week they will be ok
if you have to pull them do they will come with you call them and rub them don`t get cross with them or you will set them back
time is all you need hope this helps let me know how your getting on whit them
best of luck ;clay man