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Title: Collar slips.
Review: I agree with the other review that the collar loosens up too easily. When I had to have a leash on her, it loosened up (slipped) very quickly. I was re-tightening the collar every few hours. I would guess that the fix is just to sew it so it won't slip but instead I finally just put back on her old collar. It lasted a week while we were camping and that was the intent. The lighted collar was useful as I could see her at night from a distance to know where she was. I might sew it so it doesn't slip then use it again on a future camping trip. They need to fix the collar slip as it's a safety issue for your dog.
