《萌宠成长记》使用了先进的设备，并借鉴拍摄野生动物纪录片的手法，每一集跟随三组初生的小宠物来记录它们的生活，从出生到蹒跚学步和睁开眼睛，再到断奶和离开母亲照顾的心酸时刻，全程见证一只小萌宠的成长过程。在众多闪耀着理性光芒的社科人文纪录片中，该片无疑是一道清新可人的餐后甜点。

Max the terrier must cope with some major life changes when his owner gets married and has a baby. When the family takes a trip to the countryside, nervous Max has numerous run-ins with canine-intolerant cows, hostile foxes and a scary turkey. Luckily for Max, he soon catches a break when he meets Rooster, a gruff farm dog who tries to cure the lovable pooch of his neuroses.