I currently have 2 cairn terriers, 11 and 12 years old and I'm
going to be adding a male Collie puppy to the family on Sat.
My 12 year old male is very congenial, but my 11 year old
female is dominant. She's blind and somewhat of a couch
potato, so I'm not too concerned about her hurting the
puppy, but I would like the puppy's first interaction with
them to be positive. Any suggestions as to the best way
to introduce the 3?
Par...