Research indicates that genetics may play a significant role in canine obesity, similar to its impact on human weight issues. A genome study has revealed several genes associated with obesity in dogs, many of which are also present in humans, suggesting that studying dogs could provide valuable insights into weight management and health.
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While environmental elements, such as the availability of processed foods, are often cited in discussions of rising obesity rates, experts assert that the condition is complex with various biological causes. A 2007 study estimated that genetics could account for 40 to 70 percent of obesity risk in humans.
Dr. Eleanor Raffan, the lead researcher on this study, explained, "If you are unlucky enough to get genes that make you prone to obesity, that manifests as greater appetite, making it harder to resist those drives to overeat. Slim people aren’t morally superior – they just don’t need to exert as much willpower to keep at a healthy weight."
To investigate whether obesity is hereditary in dogs, researcher Natalie Wallis and her team examined the genes of 241 Labrador retrievers, a breed known for its obesity susceptibility. They found multiple obesity-linked genes shared between dogs and humans, with the gene DENND1B, crucial for cellular energy processing, standing out as a significant genetic link.
Wallis noted, "By looking in just a few hundred Labrador retrievers, we have uncovered new biology of relevance across species. I hope more people consider using the canine genetic model for more scientific discovery in the future, especially for complex diseases."
The findings could not only advance our understanding of human obesity but also improve canine healthcare. The Royal Veterinary College in London reported that 1 in 14 dogs in the UK are overweight, while in the US, a 2022 survey found that 59 percent of dogs were overweight, highlighting a prevalent health issue among pets.
Dr. Raffan emphasized the implications for pet care, stating, "Our results underscore the importance of encouraging exercise and limiting food intake for our pet dogs. Importantly, our data shows that management is most important in dogs with the highest genetic risk and therefore greatest appetite."
She also pointed out that societal blame towards dog owners of overweight pets parallels stereotypes faced by humans with obesity. The research calls for a shift in focus to better support owners of high-risk dogs in managing their pets' weight effectively.