we got our 2 year old Greyhound, Daisy, 2 1/2 weeks ago. Having a dog in a previously "cats only" zone has been quite an adjustment. The boys have gone from really really not liking the giant creature at all, to being in the same room, and in Jack's case, within about a foot away from her with no problems.
For her part, Daisy is ignoring them, but I think she'd like to be friends. She is a wonderful addition to our family, and is a very well behaved girl.