Puppy and newborn?

Gabriella • Mommy to Elijah James💙👶🏽

I'm due in march , and we are getting an 8w old puppy today (me my mom and stepdad) a lot of people are telling me not to... why not? Do y'all see a problem with it? I already have a dog she's a German shepherd and hound and the new puppy is a lab / retriever.