It had stretched during whatever aerobics she does when removing these things and got stuck wrapped around her head and armpit . So now I am back to the breakaway collars , which I buy in bulk . I use the plastic coated paper tags for her information and replace as necessary . Now we are in a new home and the collar we moved here with has stayed on for almost 2 months !

Question: Why is she using a breakaway collar ?
Answer: She uses breakaway collars becasue they are sold in bulk .The new collar stays with them for 2 months so it is better .None of the above choices .The previous collar stretched and wrapped around her head and armpit which could be dangerous !