Treasure--who is Tess's half-sister

Treasure--who is Tess's half-sister, a photo by woodsrun on Flickr.

My new dog.  I picked her up yesterday at my breeder's.  She's one & a half years old and is very, very nice.  Why would ANYONE want 3 dogs?  And why would ANYONE get a 1.5 year old to go with her 12 and 8 year olds?  So far so good, but Tess is too submissive around Treasure.  They did play run around the car yesterday, and do well together but Tess is jealous (no surprise--maybe once the novelty of Treasure wears off I'll be better).  I try to pay attention to Tess every time I pet Treasure, but there are only so many hours in a day.