Bald spots on healthy cat

Hello, I just noticed in the past few days some bald spots
on my little 3 year old "mixed bag" breed of black semi longhair
female cat. None of my cats take medication , all are healthy,
they eat Eagle pack or a similar quality food which is rotated.
My other 3 cats (all ages 3-7) are just fine.

I want to go a natural/herbal route, but wondering if there
are any insights into these spots? My two books, one by Dr.
Kidd and the other is "The Natural Cat" give little insight,
except to maybe narrow it down to "skin" problem.Many thanks
in advance for any posts which could help.

It may be ringworm. I would get it checked out at the vet just to make sure..

I did a quick web search and it does seem to fit the description. Oh dear.
Well, I am going to immediately use some antifungal essential oils in an
herbal ointment and a couple days and see what happens. I certainly wonder how
she got it! (she does go outside a bit...)
Many thanks for your reply.