my girlfriends maw has a cat and both my lurchers can sit in that house and not even bat an eylid, feck my younger lurcher as hard to believe and i cannot believe it still, even let her wee sisters white fluffy rabbit come up to her in the garden and sniff her! outside on the other hand they would and will both chase cats etc. its instinctive of them to chase things that move, my mate had a colliex years ago that lived with 2 cats but killed quite a few too.