and pick there runs, when getting tired , or there quarry , they ok when things are going ok easy runs, etc . i know few on here will say well my never did that, well my 4 did, its in there gens to use there brains , they are a thinking type dog, so long term they will call the shots Bryn my 1x collie x grey as always been like that, ok never stalked a rabbit, but will only run what he wants + when he wants. Now Buck my 1x alsatian x grey differnt type dog, he will do anything 1st, even tried or quarry, will tackle anything different mind set to collie. like been said drop gs