Border Collie and another Dog?

i had a similar situation. first let me thank you for caring about dogs the way you do. i had rescued a black lab from the popund and had her about 6 months before i heard what was happening to mortimer my maltese. he need to be saved also mary jane the lab did not like hime at first and mortimer was very afraid of other dogs becasue of his previous situation. there was some squabbling at first but with care and understanding they are now fast friends. the thing to do is show both daogs EQUAL attention feed them separate bowls but feed them together put them both out for potty at the same time. if you speak to one speak to other. never give one a treat without giving the other a treat as well. remember you are not their owner you are the pack leader. don't put it on your parents to include the rescue. you have to be the one that does it. hope this helps and thanx again for being kind to animals

Give both the dogs attention so one doesn't get jealous of the other, Border collies can live with other dogs (I have two border collies and they sleep in bed right next to each other) but it could take time for her to accept the new dog. She is used to having the whole house to herself, and now has to put up with a little puppy who is hyper and wanting to play all the time, which she being an older dog doesn't have that need. As the puppy gets older (and so calms down) and so long as you give the two dogs equal attention then they should be able to live in the same house.

With our male Border Collie he hasn't gotten on with our male Husky xGSD since he went into adulthood. They have had fights. We have another Border Collie who loves every dog in the house and a Husky. Casper hates some dogs and he is a control freak. You can't go into the kitchen without him barking, this is because the other male sleeps there. Have to separate them. This is the first Border Collie we have ever had. So don't know what other Collies will do. I don't think all Collies are like that though.