I had a very fiercely loyal, possessive australian Terrier to introduce my first baby to on return from the hospital nearly 30 years ago. I was worried about his jealousy.
The very first thing I did on arrival home was introduce bub to dog, allowing him to lick the crown of his head.
Sigghhh, that dog changed allegiances so fast to the bub that my head spun. Bub made a whimper and the dog told me.