I was very fortunate that when I got Wicket, Twinkle took to him straight away and played very gently with him because she could tell he was so much smaller than her. When we got Kaddie (not a yorkie), Wicket was fine, but it took Twinkle a bit of getting used to (maybe because it was another female, or maybe because of the huge size difference)....Now all three of them get on wonderfully and play together great - usually with the yorkies climbing all over the mastiff!
xxx