How to Make a Lemon Flea Spray: 14 Steps (with Pictures ...
Jun 24, 2020·The issue is that the substance that kills the fleas is derived from the rind, which can be toxic to both dogs and cats if ingested. You'd have to bathe your cat thoroughly after using the spray, which I can't imagine would be easy. Other natural repellents are rosemary and lavender which, in their plant form, are non-toxic to cats …