Your pup might be skittish at first, so key all noises until he's become which is used to his new home.
That which you are doing is to cut back the supply of blood to the tag and also tying the string tightly you can trim the blood flow and thereby letting the tag die and fall of. https://www.wiki-willebadessen.de/index.php?title=Dental_Care_And_You:_3_Healthy_Teeth_Drinks_1_In_Order_To