Jake is not happy because the new dog, Squiggles, is bouncy and keeps jumping up at him. Doodles is not happy because he is not getting as much attention anymore. Milo and Fizz tell Jake that he does not have to be big to be brave, and he learns to control the boisterous new pet.

Doodles is jealous of the new dog, Squiggles, and is so naughty that Max punishes him. The Tweenies make collages of the two dogs, and Doodles learns to make friends with the newcomer.

Doodles teaches Izzles lots of things, but allows Squiggles to take the blame for his mistakes. In the end, Doodles learns to be honest, and tells the Tweenies that he has behaved badly.