Could someone please help me! I've had my yorkie, Daisy, now for 2 years and she weighs 4 lbs. I recently (or should I say my husband) recently added an 8 week old black lab into the family. Everytime I try to get Daisy and Harley close to each other, Daisy just freezes, starts shaking and then starts foaming at the mouth. What can I do about this? Daisy stays inside and Harley is an outside dog, but they are not getting along. Please help!!