We may go get a cat today. And it is 400$ for a simple inspection of your home sructure external and setting of initial traps. Sealing any holes is on top of it. Very pricey but we will also get a cat because she said some houses cannot ever be mice proof. I suspect especially not a semi detached. Sigh. I guess we are ready for a cat. Training Billy with him will be painful I suspect: he is fixated on cats and never truly respected TumTum's boundaries. This cat may not be as patient as TumTum.