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.

After ending up in the outside world, two squabbling pet dogs find common ground against a gang of angry animals preparing an attack on humans.