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The Leonberger, or the Leo, is a large, muscular and strong dog that was bred in Germany in the middle of the 19th century. Admittedly, it is quite rare, but extremely valuable and a special dog breed. 

leonberger dog standing on a lawn

Detailed Leonberger Growth Chart For All Dog Lovers

Here is a Leonberger growth chart that will give you a deep insight into this dog's size and desirable weight for all developmental stages.