Make your own citrus homemade flea spray by cutting up a few lemons, boiling them in water, and steeping for a few hours. To apply to the fur, either use a spray bottle or dip a comb into the liquid.

Citrus can be used to repel and kill fleas, as detailed by scientists in the Journal of Medical Entomology as long ago as 1986. Make your own citrus homemade flea spray by cutting up a few lemons ...