What is Predatory Drift? | Go Dog Training | Blogs on DogTime.com
Predatory drift scares me when it comes to very large and very small dogs being together.
That said, a dog who has a dibilitating illness can be seek to be 'weak' to the other dog and that can provoke an attack.
Really, it's hard to know. But I don't think that an attack on another dog would necessarily lead to a dog to attack a human.
But you must never have them together now. THAT would worry me.