I have a female Sheltie named Mandy who is 13yrs old, I introduced a female yorkie named Keisha about 1yr ago, she is very sweet but is always trying to be the boss of Mandy, one minute she is licking Mandy's face the next time she goes after her growling and barking, Mandy is so patient with her and ingnores her most of the time when she acts like this.
In spite of this behaviour Keisha is very attached to Mandy who is slowing down and growing older.
My question is I have the opportunity to buy another yorkie the mother is now pregnant I know the parents which they are not breeding again, Mandy will not be around forever and I was planning to get another yorkie, should I take one of these puppies now or just wait, and if I do male or female? I don't want to upset Mandy or Keisha.
