Allie adopted me 6 weeks ago. I have two cats who are almost 10 years old and have never lived with any other animals.
A friend came over and helped me with proper introductions. Allie was curious for a sniff; but backed off when she got swatted. She was easily distracted. Later that same day, she wouldn't even walk past one of the cats (who stayed out just for a little while) without averting her head and eyes. From the beginning, Allie avoided the cats' favorite spots (i.e. the couch and their beds) even though she has never seen them there.
In my preparations, I spent months trying to make changes around the house in advance of bringing in a dog. I created a cat safe area (i.e. the entire basement/lower level of the house). There is a "cat hole" in the basement door. The cats' food, water, and litter have always been down there (since we moved into the house almost 3 years ago) and I added scratchers, toys, and beds.
Well, I think I did too well. The cats will not come out of the basement. One will come up for a few seconds on a reconnaissance mission (I think they play "rock, paper, scissors" to see which one has to come up) but quickly return to the basement when Allie is spotted. They are definitely runners. When Allie has seen them do this, she watches them (the whole encounter is over in a few seconds), then goes (at a relaxed pace) to where they were to sniff after they leave. She doesn't lunge, whine, or try to search for them. I think they are just "new" every time she sees them now, since they hide so much. Unless I have the cat hole barricaded (with a baby gate; at night, when she is in her crate, mealtimes, and playtime), Allie is muzzled at all times.
I do know that at least one comes up sometimes while I am gone to work and gets on the couch (kitty paw prints and cat hair in the fleece cover). She could watch Allie in her crate from there easily. But very little to nothing while I am home.
The cats do "window dance" in the basement windows (which put them at ground level with Allie; nose to nose through the glass) when I take Allie out to the backyard (on leash, not fenced). Allie looks at them for a second, then looks away.
Do I just wait them out? I absolutely do not want to force the issue and end up making things worse. I try to spend some time with them in the basement everyday, but it is not enough. I miss my kitties.