While poisoning dogs is strictly illegal, there have to be two witnesses who saw the laying down of the poison, and even then the punishment is only a modest fine.
The punishment should be greater for causing harm to an animal. 
mnli hypothesis: The punishment should be greater for causing harm to an animal.  premise: While poisoning dogs is strictly illegal, there have to be two witnesses who saw the laying down of the poison, and even then the punishment is only a modest fine.