I'm not sure if the farm cat, Marty is trying to help me sort out the mice in the roof space. It is just as likely that his aim is to capture and rehouse a mouse inside. He is unpredictable in his affections and he is cross eyed. Not the greatest hunter his hit and miss technique suggests that he might see multiple mice when in reality there is only one mouse. He also lacks the killer instinct having been completely spoilt by Natalya. I wouldn't be surprised if he invited the laundry cupboard mouse inside to play.