Echo and Tally are welcoming new additions Toby and Lucy on Saturday. They are being given to us by a coworker who feels her son does not care for them well. Our vet has told us that we need to keep the two groups separated for a while, but what else should we be doing? And when can we start introducing them to each other. Echo and Tally have been together since birth (they are turning four) and so have Toby and Lucy (they are two). Any suggestions would be appreciated. [Posted in FML issue 2735]