We have a 10 month old o Collie Cross (Lab) who has a great temprement with dc's and is well behaved generally - but he pulls like ad and is very strong!! We have tried putting him on a harness but his shoulders are so strong that while this reduces his pulling it still seems he takes us for a walk!! Does anyone have any experience of Haltis - someone mentioned them and said they worked well, have any MNetters seen positive results?! Thanks