2 month old puppy?

I got my Yorkie for christmas and she was 10 weeks old when I got her. I also have a er spaniel who is 8 but we got him when he was only a couple months old as well. from my experience there really isn't that much different in the 2 dogs besides the fact that the yorkie doesn't have as large of a bladder so need to be let out more often. it also made it easier on both dogs to be left at home because they still had eachother for company. when it was just the one dog he would tear stuff up and must have had some sort of seperation anxiety with being left alone. however if your 7 month old is a female she might not accept having another dog around because females are more territorial.