Grumpy Baby

Baby girl has not been very friendly around others lately. She's such a sweet baby at home but around non family members she's not much fun. She will not even smile at people she sees often. Mr Walker tries to give her oreos and juice boxes and she just looks at him out of the top of her eyes with her bottom lip out. She will have nothing to do with friends. Hmmm......???? Since my other kids are all so friendly, I will have some new kind of work to do with her. My kids are all a rainbow of different personalities. Once I think I've figured out one thing a new thing emerges! I'm always learning. If anyone has any ideas of handling an unfriendly one year old, please let me know!