Yes do listen to those who know best, to be honest when i took my two rescue's in i did nothing, and i was just darn lucky, my other two accepted them,they are not friends, and sure have their spats, but in general we have harmony most of the time, but this is not always the case, and if i had known better at the time i would have done all of the above ,my two had many fights with the other two, as they used to live just around the corner, so i was suprised it worked out as well as it did, good luck and i sure hope Boy is soon in your home getting more love and attention.