Why are Labrador Retrievers always hungry?
A group of researchers wanted to get a deeper understanding of canine obesity. One breed that always seems to be overweight is the Labrador Retriever. Many owners of this breed say that it does not seem like their dogs ever get full. After conducting a study, it was found that in some Labrador Retrievers and other flat coat breeds similar, there is a gene variation called POMC. One of the responsibilities of this gene is to act as that "off" button and to not eat anymore. All of the dogs that were used in this experiment did not have the POMC deletion. However, a majority of the labs that were tested did have this mutation. Researchers also noticed that POMC deletion was associated with a 2 kg weight increase. A dog with this mutation would have a harder time of staying slim. They are using this information about canine obesity as a transition into human health.
Second Link: https://www.cell.com/cell-metabolism/fulltext/S1550-4131(16)30163-2?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1550413116301632%3Fshowall%3Dtrue