Hi, this is my first posting here and I am very glad to have found this site. My 8 yr old yorkie, Willie, will be having a house guest for the month of July. My son is bringing his 6 month old yorkie from NYC to my home here in AZ. Any suggestions for how I should handle the introductions? Pops(puppy) is very friendly and even tempered, Willie is not agressive toward other dogs or people, but he is not interested in play with other dogs. Any suggestions would be welcome.