I have no experience sorry, How old are your shihtzu's? I have never thought of littermates being a problem but now that I think about it, it does make sense that they may not accept someone "new" to their pac. Hmm I would definitely say let them meet the new pup, perhaps a few times outside the home to see how they do? I am sure if you take a slow approach to introducting them they should learn to get along, definitely keep them seperate when you leave the house for a while. |