Did we just make a huge mistake?

Bethany
Over a year ago my son had a puppy. She was a wonderful puppy fully house broke by 3 months and trained well. She even knew the edge of the road and would sit waiting while we checked mail. She was hunting a squirrel and got hit by a car. My son has wanted a puppy so badly and talking about how he misses Bridget. He's very responsible and is 8 years old. We found a guy with the same mix breeds as our last. My hormones got the best of me and we picked one up. This one seems well tempered as well but is 27w 4d pregnant and now a puppy smart?!? Did I mess up?