I have 2 feral female cats that have taken up residence in my yard almost 2 yrs now and they are infested with fleas which in turn infest my yard. I can not go outdoor without spraying “off” on myself. I know that the feral cats would be more healthier and deserve that if I could find a natural flea remedy that can be placed in the food as they will not allow me to get near them close enough to touch let alone treat. PLEASE HELP!!