A South Lake mother holds fears she will be forced to give up one of her beloved elderly pet dogs after neighbours complained about the "smell of dog poo" coming from her backyard.

The stench, neighbours said, prevented them from opening their doors and windows, kept them up at night and attracted rats and mice to nearby units.

"The smell of dog poo is so bad I can not open my bedroom windows," a neighbour told the City of Cockburn.

The feud has ended up in the City of Cockburn, which is set to make a decision on Thursday night if the mother-of-two is allowed to keep the three canines.