Hi mummy Christine, I myself have a dog which was 3 yr old.. & june im goin to june..
1) Hmm for try separate room for baby & dog.. Mayb that help.
2) i read it from a book is say that baby wun contract canine diseases but they can catch worms & get flea bites. Mayb you trim your dog fur to the shortest.
3) Try reduce the number or walks . Or get home member to help out.
If you are staying with parent .. While they feeding your newborn you can try play with your dig awhile..