I have three yorkie girls and a pekingese. Snoot (my peke) was the only baby I had for 10 years. Then one day I decided I really wanted a little girl and I got my first yorkie. It took about 2-3 months for Snoot to like her and then I couldn't tear them apart. They are super close now!! About six months after that I got my second girl and a little over a year later I got my third girl.
It made no difference having two or four. Snoot is the only one that potties outside and I know that helps tons. I have a potty area for the girls. Its fake grass and they just go whenever they need too. Mine are all super close and play wonderfully together. I think I truly lucked out because I don't have any jealousy issues. If I'm sitting on the couch I have all four piled up on me and we're all happy.
I think the key is to have a good schedule and don't show favortism. I honestly believe I could add another right now and it wouldn't make a difference. My babies truly love each other. I think they would be very miserable without having each other to play with.
The only problem I have is with them hogging up the bed!!
I have a king size bed but I'm still smooshed.
