Morgan, what is the situation now?
I have two Boston Terriers, Koos and Poppie.

They were my babies and they still are. Just not my "first borns" anymore. When I brought Nienke home, I tried to give them loads of attention, they still slept in the bed (they have been moved out since), they still sleep inside, we gave them loads and loads of snacks and treats, I allowed them to sniff Nienke and occasionally lick her hand (then wash it).
They tolerate her now. They might even like her. Although afraid of her might be a more apt description. She LOVES AND ADORES them to bits. She is absolutely obsessed with Poppie. Poor Poppie...
Nienke actually got scolded last night because she rides Poppie like a horse, she hugs her that her eyes almost pop out, she kisses her and she is very rough with her. Nienke then screamed blue murder when Poppie (understandably) moved away from her.
But basically they are sorted. It's hard teaching Nienk to touch her softly, because my soft and her soft differs. But I do think it's important that she learns to love animals and to treat them kindly and gently. (Might also help her to treat new baby softly and kindly).
I agree with RM's advice. Or maybe try and get your baby to "give" your dog a snack. So that the dog realizes that this baby can have plusses as well. (My dogs know by now Nienke's main mission in life is feeding them.)
It's very easy to become irritated with our animals but they also need love and understanding. It's a huge adjustment for them too.