Seeking the ultimate Thorny barrier for Zone for USDA 8B through 9A with lots of rainfall

Hi to all,

I am pondering a problem where people are entering a property for purposes of theft, its a periodic thing, and I'm looking for a long term solution and am not thinking dogs at the moment. I was thinking a tightly planted fence of Hawthorn, because I have never seen a Hawthorn tree/bush that I would willingly push against. There are livestock on the property as well, chiefly sheep,  perhaps others in time.  Can anybody refine this idea, with emphasis on growing zones 8B and 9A with lots of rainfall , fairly fast growth profile and ease of propagation ? Are there any particularly formidable variety of Hawthorns reputed to have the biggest baddest thorns?  How about Roses? and if so any particular variety of rose?  Several similar choices of species would be nice to avoid mono-culture syndrome. Many thanks...Mike

How about Poncirus trifoliata, the trifoliate orange?

Ive seen large specimens, I think thats a definite candidate. Thanks.

Goji berry and some of the other Lycium species are incredibly thorny and have a tangled, dense habit. There's also locust and osage orange.

I like the Goji berry idea (something to sell along with Hawthorn apples.) Dont locusts lose their spines as they mature?  Thanks, another puzzle piece....M

Native blackberries 😈