It is very difficult to know in advance how your dog will react. I had a blue-tick hound, when my kids were small. He was never alone with them. I kept their doors closed at night.
Later, I had two mini dogs, one was sort of an aggressive type in general, the other a wimp--so I was surprised to see the wimp try to snap at a baby that was learning to walk (a visiting nephew)
You can never fully trust your pets around your children--especially when your kids are babies or when they are young--like under 10 years old. Dogs are naturally predators and the movements of little children/babies and the sounds they make are just like what they would find most attractive to hunt in the wild. (Think about squeaky toys and a baby's little sounds.) If you keep your dog (and completely supervise it when it is anywhere near your baby) and you see a whisper of a hint that your dog is viewing your child like a possible chew toy--or how it looks around cats-or one peep of a growl comes out of its throat--get rid of the dog. I have known someone with a little kid with a horrible scar from the bottom eyelid across their face--pulling the eye open at the bottom--from their family pet that once growled at the child, and they thought the dog would get used to the child. So they got ONE warning, and they blew it now the parents live with guilt and their little kid's scar is the first thing you notice about the child.
I am not trying to scare the hell out of you, but when you are a parent--your number 1 job is protecting your offspring.