My fiance and I have two yorkies, Okie and Sushi. Okie is almost 14 months old and Sushi will be 1yr in October. We recently went over our friend's apartment and saw her adorable Chihuahua. We've been thinking for a while about getting a third dog. Maybe a Boston Terrier or Chihuahua but I'm aiming towards the Chi. Here's the question. Sushi loves attention and always come sit between us when we're watching TV. Okie is very independent (We got Okie first and then Sushi second). I am thinking that Sushi might be aggressive towards the new puppy. Any advice or experience in this matter would be really great. Thanks.
-Dee