The first time I took Harley outside after we got him, He took off like a banchee.....omg... I was running after him in my husbands flip flops size 12 and I never dreamed a puppy yorkie could run so fast , finally I stopped and said no real firm, and he layed down. Never again, I was horrified... I also seen a Hawk just today circleling the yard. I can just imagine that.My sheltie was 14 and I could leave her in the yard and come back 4 hrs later and she would still be there. We would let her in and out and she never left the yard.That will not ever be the case here.