Tabby came with the house when we purchased it. We were told he was a feral cat and he lived in an old green house in a  cardboard box on a blanket.  It was only after a month (getting use to the  dogs) that he got more confident and started to come in the house more  often.  That was the start of the end !  Tabby now rules the house and  slept with Hattie in the days leading up to her having the pups in the kitchen  under the heat lamp together. Tabby knows how to get let in the house as  he sits on the roof by the bedroom making very sure the dogs can see him,  winding them up a treat until they bark - and we let him in to stop it. Tabby now has no teeth at all, but can still catch mice!  He is also  partial to fresh prawns.