Myth # 4: “Lavender is toxic to cats.” This is not the case. Lavender has been safely used for cats for a long time. Spike Lavender might be dangerous, but it is not typically used around cats. According to a 1988 article, an insecticidal spray that contained linalool, d-limonene, and piperonyl butoxide may cause toxicity in cats, In this case, the insecticidal used was very concentrated; further, Essential Oils were not used. It is also worth noting that this article is 30 years old. Another article referenced the toxicity of linalool against the cat FLEA (not the cat itself.) ALWAYS dilute Essential Oils, and always use Therapeutic Grade oils, and you will not have a problem with Lavender. QUESTION – HAVE YOU TRIED USING LAVENDER WITH YOUR CAT?