adopting adult dog with human baby in the house?

First of all, it's great that you want to adopt an adult dog. Usually people want little cute puppies and adult animals are harder to adopt out, so you're a shelter's dream, haha.

This doesn't seem to me like it'd be very risky, because with a kid that little, you're going to be keeping them supervised anyway. Just take every precaution and be careful about it.