So what kind of punishment do you believe is appropriate for the owner of the killer dogs?
For human injuries...something like gross negligence causing bodily harm.
Penalties could mirror those resulting from, say, drunk driving.
For attacks involving other animals, first offense...
loss of your dogs and right to own dogs for a specific time
and reinstated only on condition of a RDO course completion
and inspection by Animal Control assuring containment for your dog(s).
Substantial fine including civil penalty made to the owners of the dog killed. ($2000-$5000 range?)
To be you.