Some may experience temporary irritation at the site of application. (vetdepot.com)
Transient localized alopecia with or without inflammation at or near the site of application is is observed in approximately < 1 % of cases. (medi-vet.com)
Sensitivity, such as slight transitory redness of the skin at the site of application, may occur after using ANY pesticide product for pets. (hartz.com)