The puppies have grown significantly since the photos, so they're at a "gangly" stage. In the next couple of weeks they will continue to "fill out". The larger the breed, the longer the growth period and more periods of tall and thin/lanky and bulking up. European Boxers are stronger, larger and more athletic than a Canadian/American bred Boxer and take much longer to mature. Boxers are often 2 years old or more before they fully "fill out".