Labrador retrievers' obesity is genetic
A large proportion of the species have a "hungry hound" gene mutation
But a new study by Dr. Giles Yeo, from the Department of Clinical Biochemistry at the University of Cambridge in England, has found genetic evidence to explain this trait. Labrador retrievers - along with flat coat retrievers - were the only two in a large study of many breeds that commonly have a mutation in a gene called POMC.
This gene acts as a hunger switch in the brain, and the mutation results in it being left on. This study could provide a better understanding of the POMC mutation in humans, which can also result in obesity.