Batt then went to his mother's house where his behaviour was "threatening and irrational".
In an enraged state he began strangling a pet goat and smashed its head against a wall. He released the goat before more harm was done.
He then threw a glass at her showering her with pieces of glass, pushed her to the ground and started punching her.
His grandmother sprayed him with oven cleaner in an effort to subdue him. He then began smashing and punching objects around the property.
"Your behaviour is a disgrace, but there's more to this than meets the eye," said Judge Raoul Neave.
A previous head injury didn't account for Batt's violence.
Rather, it reflected an unstable upbringing, coupled with substance abuse and personality traits, the judge said.
Whether he deserved it or not, Batt had been forgiven by his sister and grandmother.
