In the most shocking evidence, the tribunal heard that the house's carpet was new in October 2014 when the couple moved in.
But when they vacated the premises, the carpet and underlay had to be replaced because, in the words of the carpet installer, there was "urine saturation making them beyond repair or recovery".
The pair have been ordered to pay $2300 for the five-year-old carpet to be replaced.
Another $600 has been ordered to go towards cleaning the flat, and $1477 for the cost in removing all the rubbish.
In total, the couple, who did not attend the two Tenancy Tribunal hearings, have been ordered to pay their landlords $8278.