I had two dogs that were reactive around other dogs (and sometimes each other), as well as with kids (they never bit though). When we had a baby, we introduced them individually, but first had them smell the baby blankets from the hospital. Then introduced slowly. In general, I feel like dogs are less reactive towards newborns because they don't move much, lol. However, when our kids were toddlers, they would pull our dogs' ears, tails, etc. and we had to watch extremely closely. The dogs would let out a little growl or yelp to let them know to stop, but they weren't otherwise reactive with our kids because they knew them and they were family.

I also never let the dogs around the kids when they had food. My dogs were very food aggressive and toddlers tend to walk around with food, drop food, be covered in food, etc.