Geese are great for an alarm warning...nothing gets past their attention.I've heard some geese are good for that too!
A friend of mine in FL had a couple of guard donkeys. She said things could get past the dogs that the donkeys would immediately pick up on.

I want to watch but will probably jinx them if I do.
even if she wasn’t out running birds, she should still be getting SOME form of exercise or stimulation, running or training or something. Poor thing. 