We have two pets - I brought my kitty into the relationship and he brought Ardie. It definitely took some time for them to get used to each other. When you have a hostile cat and a dog that is dead scared of cats, it is not easy for them to become friends and get along. They are still working on it, but we don't keep the separated anymore and they kind of figure things out themselves as they go along. It is so much fun hanging out with them everyday and watch them around each other!
Oh, and don't mind the carpet, haha. This picture was taken before the daily vacuuming (which they both agree on is AWFUL)