There were 2 male friends present.

Regrdless of whether they were her friends or friends of her father-in-law, one has to ask -- what were three adult males doing while the dogs were on the rampage?

Did any of those 3 males have bite marks on them to indicate they attempted to intercede and pull the dogs from the child?

What were they doing which would have prevented them from taking some action?

There are three men who should all share the guilt if they have no marks on their bodies.