I, too, am not the best person in the world to comment seeing that I've kept so many of my "fosters". But this reminds me of Starr and Fraidy, two of the last rescues of mine that went to a home of a man who already had 4 cats. He would call or email and say "No matter what I do, I can't get them to come out from under the bed. I think I may have made a mistake in taking them. They're clearly unhappy." I kept reassuring him that all would be ok but, honestly, I was beginning to wonder myself. Then, one day, out of the blue, I guess they decided that it was no longer fun under that bed and that they wanted to see what the rest of the gang was doing, so they timidly came out and now they live a life of luxury and pampering just like all the other cats do. I'd try not to get too concerned about it and, if possible, give it a little more time and, by all means, do try to keep them together. I think that may have been the key to success w/my friend; they relied on each other. Let us know how it turns out.