Review on 🐱 Hartz UltraGuard Plus Water Resistant Flea & Tick Collar for Cats - 7 Month Protection (3270094268) by Erik Haynes

Despite reading some unflattering comments I ordered them for my two cats. A young calico and a 13 year old tabby. Within a week both were mostly free of fleas and a week later they were gone. I don't find the colors dangerous or cause skin problems, they just did what was expected. Perhaps some of the people who left unfavorable comments meant that fleas were the ones who ended badly. The packaging says 7 months shelf life but I have chosen to wear new collars every 3-4 months as my cats naturally take me for walks in the fenced flower garden in the backyard. But they had no problems with fleas or other pests.