Oh the cats will get use to being Chased by your baby. I have 4 cats and Bradley never really messes with them BUT when we got Chase and he figured out what a cat was (took about a week and a slap from one cat) he will chase them though the house non stop and just bark at them. The barking is the worst. Nugget has been around cats so he doesnt really mess with them at all. Oh yeah Chase will go after my one cat Mocha and jump on her back, I try not to laugh but its cute too.
The cats will adjust in time, I have learned that. Then they will become prob great buddys