Hi Desley,
We've got two alpacas (did have four) just pets really. They're wonderful gentle creatures, aren't very tactile at all but by all accounts are very good as guards. I do know we've never had any incidents with foxes and they are around, nor with dingoes and dogs...
Like goats they need their toenails trimmed and like horses some need their teeth filed, and like sheep they need shearing...
They will make a noise like a squeaking tyre if they see danger, which can be a goanna, snake, fox or with ours dogs. We don't have dogs so they warn about them. If you do have dogs they may need introducing, and then apparently accept yours but not others.
Vicki