Thanks for the great reply!
We have five cats, as you know. Living out in the boonies (we have a horse ranch on the Big Island of Hawaii) there is always a problem with rodents. We originally had three indoor cats, still clawed, and four barn cats, who lived in the feed room. Over time, all the barn cats ran off, two who probably tried to find their way back to their previous homes, despite a LONG getting-used-to period, and two others (adopted as kittens from the Humane Society) who ran off because our dogs made their lives miserable. They returned, however, whenever we had a heavy rain, probably because their food supply in the wild diminished. We know they were living in the ravine behind our ranch, because the neighbor's children would see them there. We always left their feeder and waterer full for whenever they decided to return, but during this last rain, decided to recapture them and bring them indoors, and most likely set them up in the garage because the mice were having a heyday there.
At the present time, the (former) barn cats are living in our guest bedroom and bath, and will go into the garage soon. I would love for them to get along with the 3 others, and have at least some of the dogs be part of the indoor family, hence my request for HELP.
Thanks again to all who have responded with good advice!