We have 3 female dogs in the house. We have a dachshund mix (13 years old), a chihuahua (3 years old) and a papillon (2 years old). I'm a little worried about how they're going to react when we bring our baby girl home in january. I babysit my niece one day a week. She's 1 year old and they seem to do alright when she's there, but they're always happier when she leaves. And they get a little jealous when I'm holding her and not them. What's the best way to introduce our new baby to our 3 4-legged babies?