With 2 new puppies, we are going through collars like crazy around here! They are growing like weeds! I wanted this collar because of the reflective strip on it so when we are walking at night, it will catch the flashlight and let me know where they are. They are great about coming when called, but they are pups and can get distracted. This lets me know where they are around the farm and can get to them quicker. Love things with reflecitive strips in them!