In this CAM LIVE episode, Hannah Capon speaks with veterinary physiotherapy researcher Heli Hyytiäinen about the growing recognition of obesity in dogs as a major welfare issue. Alongside dental disease and osteoarthritis, excess weight is now understood to be one of the most significant health challenges affecting companion animals.

The discussion explores why obesity is far more than a cosmetic concern or a simple co-morbidity risk for conditions such as heart disease or diabetes. Excess adipose tissue acts as a metabolically active organ, producing pro-inflammatory mediators that contribute directly to the development and progression of osteoarthritis.

Heli highlights emerging research showing that obese dogs may accumulate lipid droplets within muscles, tendons and ligaments, affecting tissue performance and recovery capacity. These physiological changes can alter biomechanics, reduce efficiency of movement and exacerbate joint disease. Studies comparing lean and obese dogs demonstrate that stride length is often shorter in overweight animals, while joint range of motion can appear increased due to compensatory movement patterns.

Whether a dog currently has arthritis or not, maintaining a lean body condition is one of the most powerful preventative strategies for long-term musculoskeletal health.

Publishing date: May 2020 https://youtu.be/7buqnkeqovE

Guest Bio

Heli Hyytiäinen graduated as a physiotherapist in 2000 and completed her Finnish specialization in Animal Physiotherapy in 2003. Since then she has worked exclusively with animal patients. She earned a Master of Science in Veterinary Physiotherapy from the Royal Veterinary College in 2012 and completed her PhD at the University of Helsinki in 2015. She founded and developed the physiotherapy department at the Veterinary Teaching Hospital of the University of Helsinki, where she continues to combine clinical work with research. She lectures internationally on animal physiotherapy, teaches within Finnish animal physiotherapy specialization programmes and is an honorary lecturer for the MSc Veterinary Physiotherapy programme at the University of Liverpool.

Key take homes

1. Obesity in dogs is now recognised as a major welfare concern alongside dental disease and osteoarthritis.

2. Adipose tissue is metabolically active and releases inflammatory mediators that contribute directly to the progression of arthritis.

3. Obesity affects musculoskeletal tissues beyond joints, with lipid deposits identified in muscles, tendons and ligaments that impair function and recovery.

4. Biomechanical differences exist between lean and obese dogs, including shorter stride lengths and altered joint movement patterns.

5. Even modest weight loss of around 6–9 percent body weight can lead to measurable improvements in lameness and mobility in dogs with osteoarthritis.

Relevant links

Evaluation of gait-related variables in lean and obese dogs at a trot

https://www.researchgate.net/publication/236579229_Evaluation_of_gait-related_variables_in_lean_and_obese_dogs_at_a_trot

The effect of weight loss on lameness in obese dogs with osteoarthritis

https://pubmed.ncbi.nlm.nih.gov/20237844/

How obesity modifies tendons

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4241419/

Canine Arthritis Management resources

https://caninearthritis.co.uk

Good Day Bad Day Diary

https://caninearthritis.co.uk/gooddaybadday

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Stay tuned to learn how early detection can make a significant difference in managing OA in younger dogs.