Pet Obesity: A Growing Issue

Pet obesity is more common than you imagine.

Created: 8/19/2014 Updated: 10/12/2023 - Shelley Simmons

cats, diet, Diet & Nutrition, dogs, health, Health & Wellbeing, weight control

Here at the OSCAR helpline, we hear all too often about the issue of obesity in dogs and cats. Pet obesity is a serious condition and can take two years off the life expectancy of our pets. As research shows, many pet families however don't appreciate the impact of obesity.

Unfortunately, due to the vast selection of foods available to pets, the number of dogs becoming obese is rising these days, just as it is with humans. Obesity is the most common cause of malnutrition in pets.

Obesity is the development of excess fat in the body. It can happen as a result of excess energy intake (too many calories) which exceeds a dog or cats normal requirements. Obesity then develops when the food intake does not match the dog or cat’s activity patterns. Just the same for us humans, too many calories and too little exercise results in too big a waist-line!

This is exasperated often by lifestage. For example, a less active senior pet will require less energy intake than a junior dog or cat.

An overweight Golden Retriever

Health risks

Obesity is a big issue, arguably the biggest issue affecting the UK pet population. It brings with it some serious health complaints such as:

  • Shortened life span

  • Heart problems

  • Lung problems

  • Liver problems

  • Kidneys problems

  • Restricted movements

  • Arthritis

An over-weight pet may have a reduction in their quality of life too, as they are unable to exercise as easily and may have restricted movement. An obese pet may have less opportunity to have fun, as it is unable socialise with other pets and family members in and out of the home.

Overweight tabby cat

Reasons for obesity

  • Inadequate exercise, increasing age, and genetic/breed pre-disposition can all be contributory factors for obesity. Neutering increases the risk of overweight conditions via several mechanisms.

  • The age that the dog is neutered often corresponds with a natural decrease in the dog's growth rate and energy needs, which may lead to weight gain.

  • Neutered animals also tend to consume more food and to have a reduced basal metabolic rate, both of which can contribute to an energy surplus if food intake is not controlled.

  • There are, of course, sometimes other underlying factors as to why an animal becomes obese, such as hypothyroidism and hyperadrenocorticism (Cushing's Syndrome) but almost always, obesity is caused by the equations above.

Pet owners can be surprised to hear that their pets are overweight. Educating pet families what a correct body shape looks like, is just as important as managing their weight. That's why we have launched our own Body Condition Score Charts for dogs and cats.

Our body condition score diagrams are for owners to use as a guide to their dog and cats body shape. When checking the body score condition on a dog or cat, ideally you should be able to feel their rib cage through the skin but the ribs should not be easily seen.

If you would like a PDF of either our dog or cat body condition score diagrams, drop us an email on

OSCAR pet foods dog body condition score diagrams
OSCAR pet foods cat body condition score diagrams

An ideal diet

An ideal diet, then, is one that contains a balance of nutrients to aid weight loss, it will have less fat than normal adult maintenance foods (but still above the dog's basic requirement for fat), and a high-quality, highly digestible source of protein to keep lean muscle mass and reduce body fat. This type of food also has a higher fibre level to provide appetite satiety, plus all the vitamins and minerals needed to keep the metabolism normal, even in the dieting animal.

How OSCAR can help...

Feeding your dog a complete diet, which is correct for its life-stage is important to ensure the correct nutritional balance for its age.

If your dog is overweight, it is better to change to a 'lite' diet such as OSCAR Pinnacle Plus, OSCAR Pinnacle of Life and High Fibre Lite. These diets have reduced calorie and fat content to help with weight loss.

Weight gain can be avoided by carefully weighing out your dog's meal every day. OSCAR provide a bespoke measuring scoop with your dog's food to do this with. You may find that you need to cut down the amount of food your dog eats each day. Following the reduced feeding rate on the bag will help you to do this whilst still maintaining a healthy diet. Be careful not to reduce your dog's daily feed rate too much or too quickly.

Do you need further advice?

If you need any further advice, please contact the OSCAR Helpline Team on our freephone number 0800 195 8000 or email

©OSCAR Pet Foods Ltd