Growing crisis of pet obesity and mobility

As veterinary professionals, we are witnessing a significant shift in the demographic health of our patients. Recent data highlights a staggering reality: 61% of cats and 59% of dogs¹ are currently classified as overweight or obese. This is not a static issue; obesity rates have seen a steady increase across the past 20 years².

The implications of this trend extend far beyond simple weight management. Obesity is a metabolic state that can fundamentally alter a pet’s biology, shifting their gene expression from “fat-burning” to “fat-storing”. This metabolic shift creates a foundation for numerous comorbidities that severely impact quality of life and longevity.

Vicious cycle: obesity and degenerative joint disease (DJD)

One of the most critical links we manage is the relationship between excess weight and degenerative joint disease (DJD). The connection is twofold: physical stress and systemic inflammation.

• Increased risk. Obese dogs are 3 times more likely to develop DJD³.
• The mobility gap. Overweight cats are 9 times more likely to suffer from lameness⁴.
• Radiographic reality. By age nine, 90% of cats show radiographic evidence of DJD^5,6. Crucially, 60% of cats have DJD in at least one joint even in the absence of crepitus during a physical exam⁷, making early nutritional intervention vital.

This creates what we define as the “vicious cycle”: excess weight leads to joint stress, which reduces mobility. Reduced mobility leads to less exercise, which inevitably fuels further weight gain.

Breaking the cycle with targeted nutrition

Managing these patients requires a dual-action approach that addresses both metabolic health and joint integrity. Hill’s Prescription Diet Metabolic + Mobility is formulated to break this cycle through advanced nutrigenomics and high-level nutrient support.

1. Metabolic programming

Rather than simple calorie restriction, Metabolic nutrition works with a pet’s unique metabolism to help them naturally lose weight. Clinical results are significant: 88% of pets lost weight at home when fed this nutrition⁸.

2. Cartilage preservation and inflammation control

The “Mobility” component, featuring the nutrition of Prescription Diet j/d, focuses on the root causes of joint pain:

• High omega-3 levels. Formulated with high levels of EPA and DHA to help break the cycle of inflammation and preserve joint cartilage.
• Proven clinical efficacy. In a randomised, double-blind study, 61% of cats with moderate to severe DJD showed improved mobility after just 4 weeks⁹.

3. Compliance and versatility

With previous tactics which relied solely on caloric restriction success in weight management depended entirely on pet parent compliance. Oral dosing of supplements can be unpleasant and reduce adherence, and it can be difficult to know what the evidence supports. Hill’s Metabolic + Mobility, which is now available for both your feline and canine patients, offers a “mouthwatering experience” through mixed feeding options – serving the wet option alone, as a topper, or in a “half and half” format—to ensure the pet enjoys their mealtime while getting the supportive nutrition they need.

By implementing a nutrition-first strategy, we can support patients with DJD and obesity simultaneously, helping our patients stay light, limber and active.

References

1. Association for Pet Obesity (2022). Pet Obesity Prevalence Survey 2022, available from http://www.petobesityprevention.org/2022
2. Montoya M, Peron F, Hookey T, Morrison J, German AJ, Gaillard V and Flanagan J (2025). Overweight and obese body condition in ~4.9 million dogs and ~1,3 million cats seen at primary practices across the USA: Prevalences by life stage from early growth to senior, Prev Vet Med 235(1): 106398.
3. Banfield Pet Hospital (2020). Vet Report Overweight pets, available from: banfieldexchange.com/VET-report
4. Scarlett M and Donoghue S (1998). Associations between body condition and disease in cats, J Am Vet Med Assoc 212(11): 1,725-1,731.
5. Hardie EM, Roe SC and Martin FR (2002) . Radiographic evidence of degenerative joint disease in geriatric cats: 100 cases (1994-1997), J Am Vet Med Assoc 220(5): 628-632.
6. Lascelles BD, Henry JB 3rd, Brown J, Robertson I, Sumrell AT, Simpson W, Wheeler S, Hansen BD, Zamprogno H, Freire M and Pease A (2010). Cross-sectional study of the prevalence of radiographic degenerative joint disease in domesticated cats, Vet Surg 39(5): 535-544.
7. AAHA (2023). AAHA Senior Care Guidelines for Dogs and Cats, available at https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/
8. Towell TL, Forrester SD, Cross S, Tolsdorf G and Bernat S (2025). Evaluation of a Weight Management Food Designed to Increase Basal Metabolism in a Home Setting, available at https://jarvm.com/articles/Vol13Iss1/Vol12%20Iss3Towell.pdf
9. Fritsch D et al (2010). Improvement of clinical signs of osteoarthritis in cats by dietary intervention, JVIM 24(3): 771-772.