A video has recently gone viral on TikTok, after a mother shared her dog's reaction to the new arrival.
With 5.5 million views and 400,000 likes, Golden Retriever Maverick had people around the world in stitches.
Confused or excited?
"I wish I could read his mind", writes Machayla, captioning the clip that shows Maverick standing completely still as he stares at the crib,
The dog's reaction has received mixed reactions from viewers online, with people trying to work out what's going on in that doggy brain.
"He said, take it back" wrote one viewer, to which another replied "no longer an only child".
"Who ordered this? NOT me!", commented another.
Life as a big brother
He may have been a bit put out at first, but Maverick has now taken to life as a furry big brother.
"He quickly became her biggest fan and her protector. It's so sweet to see. He never leaves her side", Machayla recently told US Magazine Newsweek.
@machaylaculver I wish I could read his mind😂🥹🤍 #fyp #dogsoftiktok #goldenretriever #dogs #newborn #postpartum #momsoftiktok #trending #fypシ #foryoupagе #pov #baby #siblings ♬ Funny - Gold-Tiger