Hi Rhiannon, welcome to Pet Talk!

I would keep them indoors, if possible! Like K & L said, there are so many dangers out there, and I've seen too many of them losing their lives at a young age, hit by a car, poisened, or tortured...

Could be hard to keep former ferals indoor though, but if they tolerate it, I wouldn't let them go outside!... JMO

Kirsten