The prognosis is guarded, because in many cases new residents will introduce new cats. Every change or increase in population brings further competition and instability. Successful management of a local overpopulation problem depends upon '''active participation by all cat owners'''. | The prognosis is guarded, because in many cases new residents will introduce new cats. Every change or increase in population brings further competition and instability. Successful management of a local overpopulation problem depends upon '''active participation by all cat owners'''. |