Gabby apparently has rather tender skin. Her first collar gave her this horrible rash, all her neck fur fell out. We had it checked to be sure it wasn't anything worse and changed her collar. That helped but we decided that a soft cloth collar would be most gentle for her healing skin.
I went online and decided $15 to $25 was just too much to spend for something I could make with scraps I have at home.
So I've uploaded some new pictures showing her ugly rash and her new Martingale collar (see how it nicely covers up that bald neck?).