I have 4 cats: Maggie who is almost 2 years old and siblings, Valentine, Silver and Rose who are 8 months. I adopted them when they were 8 weeks. Maggie would get too aggressive with her play that I was afraid she'd hurt them. At those times, I would take a drop or two of Lavender Oil, rub it into my hands and then stroke it down her back. It worked almost instantly and she would calm down leaving the kitten alone. Lavender is a natural "sedative" which has a calming affect on both people and animals. I only used this a few times and now, if she becomes too aggressive I either wave the bottle under her nose or tell her,
"Have lavender, will use!" Also, lavender will not harm the cat if they clean themselves especially since so very little is used and, as in my case, not often.

I hope this is helpful to someone.

Cat Slave to 4 and lovin' it!!