Those who are cruel to animals to humans too will be cruel
To the callousness in them it can be the fuel
Those who beat their dog another person too can beat
Though sooner or later their come uppance they meet.

The man who beats his dog will beat his children and wife
'Twould seem that violence with them becomes a way of life
I cannot say i believe in one must be cruel to be kind
In that saying the truth is a hard thing to find.

Those who are cruel to animals less than human one might say
To be unkind and unmerciful is their natural way
They are angry people lacking in self control
And they have a lot of darkness of the soul.

Those who are cruel to animals are those who rule by fear
Of late too many stories of their type we hear
They are quite dysfunctional of them that is saying the least
The one cruel to his family is cruel to a beast.

Francis Duggan

http://www.poemhunter.com/poem/those-who-are-cruel-to-animals-to-humans-too-will-be-cruel/