I went to the local pet store and purchased 2 Hartz flea collars and within 5 days both my cats had collar burns ,underneath the collar both my cats had what appears to scabs and loss of hair. I called Hartz and there response was so useless and not caring all they wanted to know is what product and told me to rinse with water to remove the collar’s effects,what if I didn’t notice this so quickly ? both my cats could of been killed! I for one will never purchase anything ever again that is connected in anyway from the Hartz Company.
Please never use the Hartz Flea collars!