It is most common in large breeds of dogs and rare in small breeds. (2ndchance.info)
It's highly recommended for larger breeds of dogs which, because of their size and weight, may need more omega 3 sources than what their existing food and supplements provide. (topdogtips.com)
The breed was developed as a large companion dog, [3] making it the only large breed of dog originally bred for this purpose. (speedydeletion.wikia.com)